|Is London a forest?||London has been classified as an urban forest using private data and semi manual methods. What if we use open data, automated methods and QGIS to verify the results?||Ariadni-Karolina Alexiou||London||England|
|Mesh layer: why we need another GIS data type?||Typically, in GIS, most of real world features can be described as a pixel or geometry. But with the ever-expanding GIS usage in other areas, there is a need for a data type on structured or unstructured meshes. Meshes are ideal to define meteorological, hydrological, oceanography and other data.|
Recently, we have developed MDAL as an abstraction library to handle various mesh formats. The library has been incorporated in QGIS 3.x. Supported mesh formats can be visualised in QGIS. We are in process of developing more tools to better manipulate and convert mesh layers in future releases of QGIS.
|Peter Petrik||Prague||Czech Republic|
|Measuring geographical accessibility to health services in Tangier province (north morocco) using open source software (QGIS)||In the Tingitian peninsula, the centralization of human activities in the coastal zone has led to the marginalization of its hinterland, which has caused the isolation of these areas.|
Given the importance of roads in terms of citizens' access to social and economic services, they have been adopted as an indicator to measure the level of development of rural areas in the territory studied, their level of economic and social development, their degree of accessibility and attachment to neighboring areas and towns.
In addition, it should be noted that geographic studies have benefited from the use of GIS technology because of the quality of their production in the study and analysis of the territory.
We will try to study the territory of the municipalities of Tangier province in order to highlight the aspects of the access of the inhabitants of its patelins to the health services. And this, by specifying the duration necessary to reach his services according to the state of the roads like parameter of accessibility.
This intervention aims to show, the role of Qgis and it’s plugin like online Routing Mapper as the one of software in geographical information systems in the study of geographical accessibility and the realization of cartographic works in order to present the results of the study. In addition, it should be mentioned that the importance of SGI lies in the production of scientific work similar to our study serving as a model for the implementation of programs to fight against isolation.
Key words: human activities, tingitane peninsula, hinterland, geographic information system, accessibility
|QGIS tools for Hydrological and Hydrogeological Modeling||QGIS is viewed as a tool for spatial data preparation, analysis and compilation of the input data for open source Hydrological and Hydrogeological Models. However, there has been an increasing number of projects that integrates a variety of hydro-related software on the QGIS interface. This presentation is a compilation of the most popular projects implemented QGIS as plugins for the precipitation / surface flow / groundwater flow simulation and a discussion of the required baseline, software capabilities, and options for the model result representation.||Saul Montoya||Lima||Perú|
|Bad cop: Making QGIS enforce your organisational policies for you||Does you organisation have strict corporate policies on how maps should be created? Sick of being the "bad cop" and policing these rules yourself? Or would you just like QGIS to be more helpful, and warn you when you forget to add a scale bar to your maps? The good news is that QGIS 3.6 makes this possible! In this talk I'll introduce the new "validity checks" system coming in version 3.6, and showcase how anyone can take advantage of this system to create their own custom checks.|
NOTE: This talk will be in streaming or recorded
|Nyall Dawson||Sunshine Coast||Australia|
|Use of QGIS in Kristianstad||Kristianstads kommun is a medium sized Swedish municipality that have been working with QGIS in about five years. I'll give some examples of use in land and green space management and urban planning. But how could we get further to a more complete municipality platform based on QGIS and make progress without suffer from vulnerability of being a rather small organization? I'll discuss the problems and some ideas of solutions.||Karl-Magnus Jönsson||Kristianstad||Sweden|
|How to setup an SDI using QGIS and FOSSG for people in remote islands with limited internet access.||How we built a SDI using QGIS and other Open Source tools to make data management efficient in the Falkland Islands and how our model has been transferred to other territories with similar characteristics. We will be presenting examples of our work and achievements.||Ilaria Marengo and pb Echevarria||Stanley - Falkland Islands||England|
|IQUAview: an underwater vehicle user interface based on QGIS||IQUAview is a QGIS-based standalone user interface designed to operate autonomous underwater vehicles. The operation of an underwater vehicle benefits from the ability of representing geospatial information at many stages: first, to setup the available information of the operational site (bathymetric maps, points of interest, etc), then to plan mission trajectories and monitor the vehicle during their execution and finally, to represent output maps generated from the acquired data. We will review how all these steps have been implemented with the help of the PyQGIS libraries and show the main features of IQUAview.||Natalia Hurtos Vilarnau||Girona||Spain|
|WPS service with Qgis Processing: from the desktop to the server||We present an implementation of a full featured WPS service built upon the Qgis 3 processing toolbox. From this, we will show how we can use the algorithms managed from the desktop Qgis directly on a serveur backend. We will describe a complete workflow from the context of a deforestation study to expose maps and indicators to decision makers.||David Marteau||Paris||France|
|Organisation specific layout plugin||Using templates for easy creation of map layouts is well known in QGIS. But sometimes you need additional functionality while creating or editing a layout for your specific organisation. A custom layout plugin could help.||Raymond Nijssen||s-Hertogenbosch||Netherlands|
|OpenICGC: open strategies in public sector||As part of the Administration’s process of opening in a Knowledge Society framework, the Institut Cartogràfic i Geològic de Catalunya (ICGC) is working with the OpenICGC initiative to promote a new model of more direct relationships with citizens and professionals who work with geographic and/or positioning information.With this project, the ICGC also intends to enliven the geographic sector, in its more consolidated as well as its emerging areas, now that the geographic variable forms part of our daily lives. The project is bidirectional:• First, it offers the community the expertise in the area of positioning, visualization and analysis of data with geographic variables. It does so from a conceptual standpoint, and also in technical aspects of digital product and service implementation.• On another note, the ICGC listens to and learns from users’ real needs to generate new services relevant for them, while also harnessing society’s inertia to co-produce tools based on the products and services that the ICGC already has.The four key points to this strategy involve:• facilitating direct contact between ICGC users and specialists to understand their real needs and provide the best solution• assisting in an educational implementation of ICGC services, through tutorials, examples, presentations, prototypes, etc.• adapting the ICGC’s products and services to the feedback received for them to be truly useful and easy to use• disseminating the services based on the maps and geoinformation that the ICGC already has: official, detailed and free, as an alternative to the proprietary goods and services for profit from the main Internet players.One of the practical aspects of the Open ICGC initiative is the sharing of the source code of the Web and other app’s that the Institute generates. Users can access it in the code repository of the Autonomous Government of Catalonia (https://github.com/gencat). The opening of the code must allow its reuse by other developers and the generation of new applications and services, building added value to the work done by the ICGC for the whole of society. The digital services offered by public administrations are critical infrastructures in today’s society. Digital culture requires a co-production of goods and services in a community, which is this project’s reason for being.It is impossible to innovate unilaterally. Today the relationships that administrations establish with users must be bidirectional. We must be proactive facilitators who generate answers for the questions we are asked, and add the value of our expertise.The complexity of today’s world requires a diversity of thinking, viewpoints and ideas to understand problems and expedite their solutions. Past experience is not necessarily useful for the future. Creating and forming part of a community must enable us to keep being useful to the society we work for. This is the primary mission of the ICGC.||Sergi Anguita i Rovira||Barcelona||Spain|
|Configuring INSPIRE schemas and digital land use planning with QGIS and PostGIS||City of Tampere has been the leading user of FOSS4G tools in city development in Finland. In 2017 the general land use planners started to crave for a digital solution for creating live strategic general plan for the city. The idea was that all the information regarding a land use object should be attached to the geospatial data feature and retrieved straight from the source: the history of the land use process, related decisions, memos, visions, follow-ups on the development etc. The general land use plan should be created also so that it would not be static and could live in a digital format along the planning process. In order to achieve this a database was developed taking into account the INSPIRE directive Planned Land Use schema. The database was modelled with pgModeller and stored in PostGIS and the model was openly published in GitHub. The database was designed to take into account different code lists, land use orders, themes, documents, source datasets, metadata etc. In 2018 we had the opportunity to test how QGIS could be used as a UI for accessing the general land use database. The idea was that no coding should be used since developing special tools would lead to possible version management issues. So we ended up testing how configuring the QGIS project file would work. Using QGIS plugin called Project Generator Tool, applying relations to the layers via QGIS project properties, configuring layer attribute forms and visualizations we came up with a solution for using the general land use database. Now the QGIS project has been tested and used by the land use planners in the city of Tampere enabling the digital land use planning efforts in the city. The ability of QGIS for creating attribute forms suitable for specific needs has been a huge asset to the project. The land use planners can also make modifications to the forms if needed and also if there is need to create new schema for the land use plan, they can easily configure the new parts themselves without any need for coding understanding.||Sanna Jokela||Turku||Finland|
|EO Time Series Viewer - A Plugin to explore Earth Observation Time Series Data in QGIS||Satellite missions like the Sentinels, Landsat or Pléiades provide Earth observation (EO) data with repeated and global coverage. These time series allow the identification and characterization of land cover and land use (LCLU) change, such as deforestation, burning, agricultural intensification, urbanization or long-term gradual changes of bio-physical properties. The simultaneous visualization of the different spatial, spectral and temporal domains in such time series helps to better understand change processes and is an essential step to identify and describe reference areas for model calibration and validation in many studies. Recently, several software tools have been developed to support the visualization of and feature extraction from time series data. Unfortunately, these are often bound to specific sensors, selected data sources, or specialized scientific workflows. They can usually not be utilized in flexible ways and especially the simultaneous and consistent visualization of data from different sensors is often not foreseen. Our major goals were to overcome these limitations by implementing a graphical user interface for an (i) integrated and interactive visualization of the spectral, spatial and temporal domains of raster-based EO time series data, (ii) which supports multiple sensors and various raster formats, (iii) allows for easy adjustment of visualization settings, (iv) can be used offline and eases the derivation of reference information based on vector data formats. Addressing users with different backgrounds and levels of experiences, we developed the EO Time Series Viewer to visualize and label dense multi-sensor time series data. It is implemented in Python, uses the APIs of QGIS 3, Qt5, GDAL 2.2 and PyQtGraph, and already became an official QGIS Plugin. We will demonstrate the EO Time Series Viewer and its data and visualization concepts using a multi-sensor time series of Landsat 7 and -8, Sentinel-2, RapidEye and Pléiades observations. In particular, we like to share our experience in using QGIS and the QGIS Python API for handling multi-sensor time series Earth observation data and provide ideas for future enhancements of QGIS.||Benjamin Jakimow*, Sebastian van der Linden, Fabian Thiel & Patrick Hostert (* presenting author)||Berlin||Germany|
|Earth observation data processing in QGIS with a python API||Free and open source software (FOSS) is becoming more and more important for the processing of Earth observation (EO) data. Reasons for this development are manifold. Yet, the availability of programming languages such as R, Python or Julia plays a major role in this context. These languages are easy to learn and used by many scientists who in the past may not have programmed for their analysis. At the same time the languages include very powerful and problem-oriented packages, enabling implementations even by relatively inexperienced programmers. In the general context of FOSS for analysing geodata, the release of QGIS version 3 marks a milestone. Its suite of available plug-ins and the interfaces to python make it a very powerful environment for EO data analysis. Nevertheless, the in-built python integration of frameworks like GDAL, Qt, and especially NumPy and SciPy is not fully completed with regard to the analysis of EO image data analysis. For example, the application of machine learning approaches like Random Forests or Support Vector Machines for regression as easy-to-use QGIS processing algorithm is still missing. We present packages for integrating the functionality of scikit-learn, the most-advanced package for machine learning in python, into the QGIS processing framework. These can be used by programmers to call a variety of machine learning methods on geodata and to develop their own QGIS processing algorithms with user-friendly, customized widgets to collect the parameters required to run their algorithms. The full potential of this integration framework is illustrated along the example of the EnMAP-Box 3.0. The EnMAP-Box is designed to process imaging spectroscopy data and particularly developed to handle data from the upcoming EnMAP (Environmental Mapping and Analysis Program) sensor. It serves as a platform for sharing and distributing algorithms and methods among scientists and potential end-users. The two main goals for the development are to provide (i) state-of-the-art applications for the processing of high dimensional spectral and temporal remote sensing data and (ii) a graphical user interface (GUI) that enhances the GIS oriented visualization capabilities in QGIS by applications for visualization and exploration of multi-band remote sensing data. In particular, we like to share our experience in using QGIS and the QGIS API for handling earth observation data in the context of machine learning and provide ideas for future enhancements of QGIS.||Andreas Rabe, Benjamin Jakimow, Fabian Thiel and Sebastian van der Linden||Berlin|
|Building a water/wastewater utilities management solution around QGIS||The talk presents how and why QGIS is used as a platform for water/wastewater utilities management.||Tudor Bărăscu||Râmnicu Vâlcea||Romania|
|Towards Spatial Humanities: Collaborative tools and open data||Geospatial knowledge structures are leaving every time plus independent studies towards a more complete and relational vision. SIG is still a tool to see the Geographic information of new itineraries to follow and the academic work in Humanities would improve considerably with a renewed attention to the geospatial. Some of the most innovative projects demonstrate a movement towards "deep maps", described by David J. Bodenhamer that combines oral testimony, anthology, memories, biographies, natural history in order to reach into a holistic approach by using QGIS.||Mª Aránzazu Serantes López||Ferrol||Spain|
|QGIS and GeoNode for Integrated Water Resources Management||For Integrated Water Resources Management (IWRM) sharing of data among water sector organisations and projects is essential. This presentation will present cases in Benin, Kenya and Mozambique where Spatial Data Infrastructures (SDI) were recently established and sharing of Open Data is encouraged. The presentation will not only cover the technology (QGIS and GeoNode) but also the road map for implementation, co-design with the stakeholders, capacity development and lessons learned.||Hans van der Kwast||Delft||Netherlands|
|Poster||GIS and Mapping Support for the Ugandan Refugee Response||Currently Uganda is hosting over 1 million refugees, of which over 900,000 are from South Sudan. Refugees are fleeing horrific human rights violations including sexual violence, torture and even death in South Sudan. Uganda has one of the most generous and progressive approaches to hosting refugees in the region, if not the world. Refugees are given relative freedom of movement, equal access to primary education, healthcare and other basic social services, and the right to work and own a business. The Humanitarian OpenStreetMap Team in Uganda is providing GIS and Mapping support to organisations responding to the refugee crisis through offering GIS trainings. Using QGIS is the easiest way for these organisations to develop capacity in GIS that helps them improve in program planning and service delivery to the refugees and the hosting communities.||Geoffrey Kateregga||Kampala||Uganda|
|SLYR or: how I learned to stop worrying about ESRI Symbols!||What to do when a customer who is gradually approaching open source, decides to convert a library with 1200 symbols for ArcGIS to use them in QGIS? Converting them by hand did not seem like a good idea. Tools to do the conversion with sufficient quality did not exist, but there was an interesting open source project in the embryonic state that had the objective of being able to convert ESRI symbols into QGIS symbols. Thanks to a great collaboration with the project’s creator SLYR is now mature and allows you to convert symbols easily and accurately. And who knows, one day, thanks to your support, it will be possible to convert MXD projects too...||Mario Baranzini||Lumino||Switzerland|
|The Integrated Risk Modelling Toolkit: a QGIS plugin driving the OpenQuake Engine||The Integrated Risk Modelling Toolkit (IRMT) plugin provides user-interface to control the OpenQuake Engine (OQ-Engine), a free, open-source calculation engine for earthquake hazard and risk analysis. It runs on operating systems such as Linux, macOS and Windows, and it can be deployed on laptops, desktops, standalone servers and multi-node clusters. Through the IRMT it is possible to visualize a list of completed or running jobs, to submit new jobs, to monitor their progress, to retrieve and visualize parameters and results... all seamlessly within the QGIS interface. The OpenQuake Engine Server can run locally on the same computer where QGIS is running, or remotely (e.g., on a cluster), and it offers a HTTP RESTful API that returns numerical outputs as Numpy compressed objects (NPZ). A 'Data Viewer' dock window added to QGIS by the plugin triggers the interactive visualization of different types of outputs produced by the OQ-Engine, such as hazard curves or aggregate loss tables. When a compatible output is loaded, a QGIS layer is built and loaded into the QGIS map canvas and displayed with a relevant styling that is automatically applied. Meanwhile, the Data Viewer is ready to visualize curves and tables related to features that will be selected in the map. The Data Viewer also offers export functionality, for saving selected data and plots. Full compatibility between the IRMT and the OQ-Engine is maintained through continuous integration on Travis, running integration tests on demo datasets and ensuring that all manageable OQ-Engine outputs continue to be successfully loaded by the plugin. Both the IRMT and the OpenQuake engine are available from github: IRMT: https://github.com/gem/oq-irmt-qgis OpenQuake engine: https://github.com/gem/oq-engine||Paolo Tormene||Pavia||Italy|
|State of QGIS 3D||The talk will summarize the development of QGIS 3D in the past two years and discuss the future plans.||Martin Dobias||Prague||Czech Republic|
|prjQGIS – A novel geospatial data editing model for the Brazil’s 2020 Census||The Brazilian Institute of Geography and Statistics (IBGE) is responsible for the geographic information and official statistics in Brazil. Its structure includes the Directorate of Geosciences (DGC) and, in this, the Coordination of Territorial Structures (CETE). In the Brazilian states are the Territorial Base Supervisions (SBTs) and the branches of Regional Agencies. In numbers, there are 27 SBTs and around 500 agencies. The issue is the need for continuous updating of territorial information (Territorial Base – BT) for censuses and sample surveys. This demand requires synergy between CETE, SBTs and Agencies with their effective participation in spatial data editing. The previously model presented limitations in the on-line editing process due to deficiencies in data communication infrastructure, traffic volume, complexity in operation and high software licensing costs. Considering this, the novel solution proposed was based on: - Use of FREE PLATFORM. IBGE would not have to spend financial resources for software licensing. - COLABORATIVE DEVELOPMENT model in which everyone could participate and contribute to its improvement through suggestions, criticisms, notes, development, tests and documentation. - DATA INTEGRATION from different databases (Geographic Operational Base - BOG, Mapping System - SISMAP and National Register of Addresses for Statistical Purposes - CNEFE) in a single visualization platform enabling the construction of indicators of territorial occupation with a view to the planning of BT. - TOOLS CUSTOMIZATION. Customizing a tool can facilitate learning, improve understanding and application of concepts, significantly increasing work performance. The platform adopted for the implementation was the QGIS for its complete compatibility with the mentioned requirements. The initiative is called prjQGIS. The customizations made in prjQGIS count today with 12 operational plugins and others in development. These additions enable interoperability between systems, seek to ensure consistency of information entered and give greater agility to work. The initiative was used for the production and maintenance of BT that met the 2017 Agricultural Census. The results that the prjQGIS presented could be observed in the production of the inputs (both printed maps and geospatial files loaded into Mobile Collection Devices - DMCs). The prjQGIS will be used as BT's main operational tool for the 2020 Census.||Fabiano Saraiva||Curitiba, PR||Brasil|
|Mapping Sacred Landscapes using Qgis and Space Syntax Toolkit||Sacred landscapes is a research topic that has been explored mainly among humanities scholars. With the improvement of digital technologies and geographic information systems new perspectives on the subject can be established focused on geographic and conceptual space. In this presentation we will explore an assortment of technologies to display visual cultural data about the Buddhist monasteries sites of Tibet spread across the Himalia’s mountains. In Qgis and through terrain analyses (hypsometry, slope, aspect and hydrography) we will analyze the characteristics and symbols of auspicious sites of a set of monasteries. Using the plugin Space Syntax Toolkit and through the technique of axial analyses (Hillier and Hanson, 1984) we will also analyze the accessibility within each monastery.||Israel Guarda (co-author with Rosália Guerreiro)||Lisbon||Portugal|
|Using KML to import styles from Geomedia and ArcGIS||There is no canonical form to represent styles. Every one likes to create their own style language and extensions. There is not limit: just the creativity of each community behind each style proposal. QGIS is no exception. Users are already able to transfer data from different formats. Tools like GDAL are really important to provide the data interoperability that we have today. But users also need to transfer style definition between systems. In this presentation we discuss how we can archive better interoperability between different platforms. In particular, we present a new plugin able to read KML generated by ArcGIS and Geomedia and use the style in QGIS.||Jorge Gustavo and Paulo Almeida||Braga||Portugal|
|The New Spanish Standard for Open Geographic Data||The Spanish Standardization Technical Committee 148 “Digital Geographic Information” decided in 2016 to define a Spanish standard on Open Geographic Data to have an objective procedure to verify and certify if a geospatial dataset is published or not as Open Data, as a tool to promote and support Open Data. UNE 148004:2018 “Datos geográficos abiertos” (Open Geographic Data) was approved in 2018 after following the standard UNE processes, including two round of comments and one public information period. More than the eighty five per cent of the comments received were totally or partially accepted and we think the result reflects the consensus reached in the Spanish geographic data community. This Spanish standard stablish a standard technical full and detailed definition of what is Open Geographic Data (OGD) and defines a set of objective requirements to be fulfilled in order to publish a geographic dataset as Open Data. It is based in three main principles: - Principle of minimizing barriers, following the idea that Open Data are data published without economic, technical and legal barriers for their use and reuse.- Principle of no-discrimination of any kind of users, field of application, social group and future use of data.- Principle of technological neutrality, which is in fact a particularization of the former one stating that any user shall be discriminated on the basis of the technological solutions (browser, operating system, software…) he has chosen.Applying those general principles, UNE 148004:2018 defines four conceptual levels for geographic data in the way of progress towards having OGD: available, well described, under an open license and in an open format geographic data. It provides also an Abstract Test Suit for verifying and certifying, if required, Open Geographic Data. In this communication a general approach to open geographic data, a justification for developing this standard and a brief and complete summary its contents and prescription are given. We think this new Spanish standard will promote and support Open Data in the field of Geographic Information and we hope it will promote the progress and grow of the Spanish geospatial sector.||Antonio F. Rodríguez Pascual, Celia Sevilla Sánchez, Juan Manue Rodríguez Borreguero||Madrid||Spain|
|QGIS for SAR (Search and Rescue)||Debatir sobre si es posible y cómo crear la figura de técnico SIG (aplicando QGIS) como ayuda en los operaativos de búsqueda de personas desaparecidas.||José Vicente Romero Ballestero||Pamplona||Spain|
|Open Source GIS in Agency for Restructuring and Modernisation of Agriculture (Poland)||The aim of Agency for Restructuring and Modernisation of Agriculture is to support agriculture and rural development in Poland. The Agency is active QGIS and other open source GIS software user and QGIS plugins founder. The aim of presentation is to present tools developed by the Agency||Michał Drożdż, CEO of GIS Support (Poland)||Lublin||Poland|
|An Overview of the QGIS Certification Program||The QGIS Certificate Program is designed to promote both community involvement in the QGIS project and quality education for QGIS software. This talk will explain the program, what is involved in becoming certified, and how it benefits QGIS, educators and students.||Kurt Menke||Albuquerque||Unated States of America|
|Use of QSWAT to estimate flows in ungauged rivers: a case study in northwestern Spain||The small tributaries that drain the Central Carboniferous Basin of Asturias (Spain) are ungauged, given the scarce entity of their channels. The problem occurs when in the valleys that drain these small rivers are located orphan mines that leach their pollutants into the river. When it comes to estimating the pollutant load transported by these rivers there is the inconvenience of not having flow data. QGIS has a plugin, QSWAT, that allows the hydrological modeling of watersheds, and using this tool it’s possible to estimate in a robust way the flows of the non-gauged rivers. The strategy is the calibration of the model based on a gauging station in the main channel of the basin, and from this calibration extract the flows of the sub-basins of interest. The application of this methodology has allowed estimating the flows of several ungauged basins with the presence of orphan mines, in which there is a control of heavy metals in surface waters. From the flows obtained in QSWAT it has been possible to estimate the pollutant load contributed by each basin to the main channel of the caudal river. The use of QGIS, due to it's free and Open Source, makes it possible to share the results openly with any stakeholder, in contrast to the options that require a payment license.||Antonio Luis Marques Sierra; Nieves Roqueñi; Jorge Loredo||Oviedo||Spain|
|Behind the Scenes of the QGIS project||The presentation will provide a "behind the scenes" look on QGIS as a project from different perspectives. It will show the perspective of a professional user, of a developer and contributor and the QGIS PSC and the board. It will show challenges we face as a project, our attempts to solve existing problems we face as a project, how we try to organize and finance our efforts. It will also show how you can be a good open source citizen and can influence the project.||Andreas Neumann||Zürich||Switzerland|
|A holistic approach to delimitate mine polluted microcatchments: generation of geoenvironmental cartography of Nalon catchment with QGIS||Nalon catchment in Asturias is the biggest river basin in northwester Spain. In these river basin mining and metallurgical industries were most important activities during last 200 years. Coal mining was the most important resource, and most of coal mines were under closure phase. Two gold mines and more than 30 quarries for industrial minerals and aggregates were in Nalon basin. However, most important mining impact in catchment streams were from orphan metal mines. Mercury mines were most important metal mines in region, and most important source of metal(oid)s. |
Several local studies have been carried on mercury mines, but a basin approach does not yet exist. This is an important reason that creation of a geoenvironmental cartography becomes necessary to integrate all the scattered existing studies. A holistic approach involving various disciplines has been sought to create an geoenvironmental cartography that shows the microcatchment affected by mine influenced water (MIW). The integration of hydrochemical data, remote sensing, land use, hydrology, etc., has been done through a GIS, which allows not only the realization of cartography, but also the realization of specific queries.
The objective has been to achieve geoenvironmental mapping with QGIS that will serve as a basis for further studies and show the affected microcatchment. In this work the results obtained based on the methodology used were shown and discussed; possibilities offered by the geoenvironmental cartography generated with QGIS in the management and decision making processes were discussed too.
|Noe Anes Garcia; Antonio Luis Marques Sierra||Gijón||Spain|
|Methodology for the generation of solar radiation maps for the feasibility study of solar projects using QGIS.||In this work, a methodology for the generation of solar radiation maps is presented. It's a simple methodology that allows the use of open source GIS software for the development of solar farm feasibility projects. This methodology is an adaptation and synthesis of various previous works, allowing a simpler workflow to be oriented to areas of work with scarce data. These solar maps are the result of the treatment, study and correlations obtained from meteorological stations data distributed throughout a study area. For the development of this work we have chosen to use QGIS because the current power of this open source GIS is perfectly adapted to the requirements of this work. |
Using the results of the program for starting data, the incident radiation in a study zone is estimated. The main result of this study is to produce various types of maps (horizontal irradiation and inclined surfaces, temperature, etc). These results allow to have a simple tool for the initial evaluation of solar projects.
|Jose Marcos Ulecia Roman; Antonio Luis Marques Sierra||Oviedo||Spain|
|Cartography of risks associated with ancient mining work: a case study in the Asturian central coal basin||The subsidence of the land is a natural risk that affects large areas of the territory causing significant economic damage and a great social alarm. The subsidence of the land can be due to numerous causes such as the dissolution of deep materials, the construction of underground works or mining galleries, the erosion of the ground in depth, the lateral flow of the soil, the compaction of the materials that make up the land or the tectonic activity. All these causes are manifested on the surface of the land by vertical deformations that can vary from a few millimeters to several meters for periods ranging from minutes to years. In Asturias, the subsidence linked to ancient mining is one of the biggest urban problems in certain populations of the central coal basin. The exploitations of the 19th century and the beginning of the 20th collapsed due to deformations of the terrain creating large deformations that sometimes affect homes.|
An initial phase of the mining subsidence studies is to delimit the possible areas of affection starting from the existing old mining cartography. For this it is necessary to georeference the existing plans and digitize the exploitation galleries by depths. Once the Shape layers containing the mining work have been carried out, an algorithm is applied that defines the affected areas according to the depth of the work, taking into account the geology of the area. QGIS is a free and open source tool that has great potential to develop this type of work, also offering the possibility of sharing projects with affected stakeholders, thus increasing the transparency of the process.
In the present work a case study is shown in the Asturian central coal basin where the possible zones of affection of old mining works on a small municipality have been delimited. This initial cartography will serve to delimit the necessary actions to control the subsidence produced by the old mining works.
|Marqués Sierra, A.L. & Cienfuegos Suárez, P.||Oviedo||Spain|
|Because data is outside - QField, the future of QGIS on mobile devices||QGIS is efficient and comfortable in everyday office life. However, data collection often begins on the field. Whether in shiver or sunshine, working outdoors requires a solution that is optimized for mobile devices. QField is the perfect companion of QGIS.||Marco Bernasocchi||Laax||Switzerland|
|Analysis of Rohingya Refugee Settlement Trends Using Remote Sensing||Rohingya refugees amounting to more than half a million have fled to neighboring Bangladesh since August 2017, joining thousands of others living in overcrowded settlement camps in Teknaf. Using remotely sensed Sentinel-2A and -2B imagery and a random forest (RF) machine learning algorithm with ground observation data, we quantified the territorial expansion of refugee settlements surrounding the largest concentration of refugee camps—Kutupalong–Balukhali, that developed between pre-August and post-August of 2017. Thus, in this study the chosen images are dated at the start of 2017, end of 2017 and end of 2018. The differences in the settlement size between these dates are used to depict the expansion rate and to consider the directional growth of these camps. The project aims to shed light on combinations of past decisions, conditional factors, and to add value to preparational planning.|
Muhammad Hasan Mustafa, Tanmoy Chakraborty, and Jordan Bates