Teton County Wyoming

GIS Data Overview

Introduction

Land Ownership

Parcel ownership

Historical ownership

Addresses

Subdivisions

Easements

Public Land Survey System

Roads

Zoning

Conservation Easements

Aerial Photography

Traffic Zones

USGS Quads

Digital Elevation Models

DEM's

Contours

Slope Analysis

Hydrography

Natural Resource Data

National Wetlands Inventory

Wildlife

Land Cover

Vegetation

Bedrock Geology

Hazards

Land Slides

FEMA Flood Insurance Rate Maps (DFIRM)

Fire Evacuation Zones

Jackson Lake Dam Failure Inundation Areas

Wyoming Water Development Commission (WWDC)

Infrastructure

Voter Precincts

Special Districts

Environmental Assessments

Dispatch

Emergency Management

Introduction

This "Data Overview" is written primarily for the Teton County staff, and secondarily for the public. Not all of the data discussed in this page is distributed to the public from the Teton County website. Public distribution of the data is divided into three categories:

  1. Base data produced by Teton County is freely distributed subject to the terms and conditions set forth at http://tetonwy.greenwoodmap.com/gis/download/ . The base data includes property ownership, zoning, Public Land Survey System, and various easement layers.  Instructions on accessing metadata via MapInfo can be found here..
  2. Photogrammetric data produced by Teton County is licensed for public use for a fee, due to the high cost of producing this data. The photogrammetric data includes the color aerial photography, and vector contours. The data is distributed on CD and is available from the Teton County Clerk's Office (307-733-4430). 
  3. Data that is not produced by Teton County is not publicly distributed by Teton County. Contact the agency that produced the data, or a data clearinghouse, to acquire these data.

Land Ownership

Parcels

County\Ownership.tab

Property lines and ownership information are on the Ownership layer in MapInfo (the Lots & Parcels Lines layer in the web browser based GIS).   The majority of the data comes from the Assessor's Tax Roll.

Most of the property on the Ownership layer is represented as polygons, however, condominiums,  some townhomes, and additional addresses are shown with point symbols: either circles or squares.

Circles represent approximate locations –

  • Address only points when the exact location is not known
  • Individual condominium units within a condominium plat, where the order or relationship between the circles does not necessarily reflect the actual layout on the ground.

Squares represent accurate locations -

  • Address only points where the exact location is known
  • Actual location of a condominium unit on the ground.

Historical Ownership

County\Retired.tab

Historical data is located in the retired layer.  This layer shows previous parcel configuration, ownership information, responsible deed, and the date it was changed. This layer is not exhaustive and in some instances only depicts the previous parcel configuration. This layer is not currently available for public download but will be provided on email request to gis@tetonwyo.org

Addresses

County\Address.tab

Address points are located in the address layer under Text and Labels layer group. This layer is used for labeling street numbers in MapInfo and on the public mapserver.  The attributes on these points are updated nightly.  

Subdivisions

County\SD_aggregated.tab

Under the ownership layer group is a  layer call subdivisionlink.  When a parcel in a subdivision is clicked with the lightning bolt in MapInfo it will link to the digital plat.   This layer is also used for labeling purposes in MapInfo and the public MapServer.  

Easements

County\easements.tab

The lines shown in the easement table are primarily road easements. Levee easements and pathway easement are shown as well, however, utility easements are NOT shown.

Public Land Survey System

County\

Shown on three different layers:

PLS - this is the most detailed layer; it shows section lines, quarter section lines, some 1/16th section lines, GLO lot lines, HES lines, and meander lines. This layer also has relevant annotations.
L_TwnRng - Township and Range lines and annotations for overview purposes only.
R_pls - Sections as closed polygons (regions) useful for annotating and queries.

Roads

County\

roadcl_segmented - road network that has roads segmented at all intersections.  It contains from and to address ranges, this layer was generated for 911 purposes.

Road_cl gets generated from  roadcl_segmented  layer every night.  Road_cl is the layer used in all county workspaces.

Both roadcl_segmented and road_cl are distributed to the public

Field definitions:

Type

CM:     County maintained

CO:     County road

JA:     Town of Jackson road

FS:     Forest Sercice road

ID:     Idaho road

MT:     Montana road

US:     US Highway

WY:     Wyoming Highway

NP:     National Park road

Priority

1:     US or WY Highways

2:     County roads

3:     Town of Jackson roads

4:     other roads

Zoning

County\ or ToJ\

Under the Zoning layer group are the following layers

  • Comprehensive Plan
  • County Zoning
  • County Overlays
  • Town of Jackson Zoning
  • Town of Jackson Overlays

To view these layers turn them on in the layer control “Zoning” group.  Once turned on the legend will also populate with the styles.

CompPlan_2012 is the current Jackson/Teton County Comprehensive plan adopted May 8, 2012.   Please refer to the Teton County Planning department website for further details about this layer:

http://www.tetonwyo.org/compp/topics/jacksonteton-county-comprehensive-plan/251817/

CompPlan_2012 can be classified by Subarea Class or District Name.

The zoning layers were developed during the 2012 comprehensive planning process. Please refer to the County or Town planning Departments for more details about this layer.

Conservation Easements

County/ConservationEasements

Six organizations in Teton County hold conservation easements:

  • The Jackson Hole Land Trust
  • The Nature Conservancy
  • Teton County Scenic Preserve Trust
  • U.S.A. (Department of Agriculture - Forest Service)
  • National Fish & Wildlife Foundation.
  • Wyoming Game and Fish (WGF)

These layers are in the “Conservation Easements” layer group.  Once turned on the legend will also populate with the styles.  These layers are publicly distributed from the Teton County website.  

Conserv.gif

Aerial Photography and Digital Ortho Quads

County\Aerial_Photos

All of the aerial photography is in the Aerial_Photos folder and sub-folders, which are named by year. Teton County aerial photography covering most of the privately owned land from Hoback Junction to Moose, Alta, and Buffalo Valley has been done in 1999, 2001, 2003, 2005, 2007, 2009,  2011, and 2013. Each pixel in the images represents approximately one square foot on the ground.

Black and White aerial photography of the Town of Jackson was produced in 1998, and color photography in 2003, 2005, 2007, 2009, and 2011 . Except for the 2011 imagery, the Town of Jackson imagery is at a ½ foot / pixel resolution (each pixel represents approximately ½ square foot on the ground. The 2011 imagery is at a ¼ foot / pixel resolution (each pixel represents approximately ¼ square foot on the ground.

The aerial photography layers are a part of the Ownership10 and Planner2012 MapInfo workspaces, and the web browser based GIS.

Teton County charges a $1,000 licensing fee to individuals who wish to license this data. The data is distributed on CD and is available from the Teton County Clerk's Office (307-733-4430).

Historic aerial photography covering parts of Teton County for years 1945, 1967, 1977, 1978, 1983, 1989, 1994 is also in the Aerial_Photos folder and is also available at no cost through the Teton Conservation District web site at www.tetonconservation.org

A 2001 county-wide infrared ortho-image produced by the National Agriculture Imagery Program (NAIP) is in the 2001_CIR folder. It is at a 1 meter / pixel resolution.

True color 2002 ortho-imagery of Grand Teton National Park at a 1 meter / pixel resolution is in the 2002_GrandTeton folder.

Traffic Zones    

County\

The traffic zones were used to do WYDOT traffic modeling for the 2000 Transportation Plan. They are not relevant to the current Integrated Transportation Plan. The TrafficZone table is not currently on the County GIS data distribution page, nor is it in any of the workspaces. If you need this layer you will need to open it manually.  You may request a copy by email:  gis@tetonwyo.org

USGS Quads

DRG\

Scanned USGS quads are called Digital Raster Graphics (DRG). They are not opened as a part of the standard workspaces, but may be added to any map window. They reside in the DRG folder. You may wish to start by opening the Index table in the DRG folder to pick the DRG that covers the area you are interested in.

The DRG folder also has a sub-folder named "Seamless" which has DRGs that have had their collar trimmed off and have been spliced together to form a single seamless table. The seamless table is called "All_TC_Quads". This layer is easier to use, provided that you do not need any of the collar information.

A good source for DRGs is the US Department of Agriculture Geospatial Data Gateway https://gdg.sc.egov.usda.gov/

Digital Elevation Models (DEM)

DEM\

There are various ways in which topography and elevation are represented in a GIS. All of Teton County's 3-D data is in the "DEM" folder. Below are two of the DEMs of Jackson Hole - East and West Gros Ventre Buttes are in the middle.

   ColorDEM.jpgShadeDEM.jpg

Contours

DEM\5_ft_countours

DEM\1_ft_contours

Below the DEM folder is the "5_ft_contours" folder, which has elevation contours at 5 foot intervals for the area covered by the 1999 photogrammetry. The contour coverage is split into five regions: 39N, 40N, 41N, 42N, and Alta, which generally follow the townships.  These contours are distributed to the public as a part of the photogrammetric product.

The contours have two attributes: "Elev", and "Type".

Elev is the orthometric height in feet, on the North American Vertical Datum of 1929 (NAVD29), which is a fancy way of saying "elevation".

The Type attribute is a three character field.

  • The first character of the type field is either an "X" or an "I". "X" contours are at 25 foot intervals, while "I" contours are the intermediate 5 foot contours. You can query for type "X" contours if you want to make a map showing just 25 foot contours. This would be useful when 5 foot contours are too dense.
  • The second character of the type field is either "O" or is blank. "O" stands for obstructed; where vegetation made it difficult for the photogrammetrist to see the ground. These contours are less reliable.
  • The third character of the type field is either "D" or blank. Type "D" contours are depression contours (holes).

1 foot contours of the Town of Jackson (1998) and the commercial area of Teton Village (2001) are in the "1_ft_contours" folder.  These contours only have elevation in feet associated with the data.

Slope Analysis

DEM\Slopes

DEM\VM

Under the DEM folder is the "Slopes" folder, which contains slope analysis. There are two categories of slope analysis:

  1. The RA District Slopes that were in effect under the old comprehensive plan:

0% - 10%

10% - 15%

15% - 30%

Over 30%

       2.   Over / Under 25%, which is the relevant criteria for the current comprehensive plan. 

   Slopes.gifSlopeLegend.jpg

Also under the DEM folder is the "VM" folder, which contains the Vertical Mapper grid files. Vertical Mapper is a MapInfo add-on, and is the program used to process 3-D data in MapInfo. Vertical Mapper provides tools for viewshed analysis and image draping, among other things. You have to have Vertical Mapper installed on your computer in order to work with this data

Hydrography

County\

There are three hydrographic tables "Water24k", "Water", and “Water250k” which show lakes, rivers, and creeks at various scales.

Water24k – derived from the Cogan vegetation work where available and from USGS 1:24,000 scale                          mapping

Water - derived from USGS 2014 NHD 1:100,000 scale mapping

Water250k – derived from USGS 2014 NHD 1:250,000 scale mapping

The three images below show the same area (the confluence of the Gros Ventre River with the Snake River) and illustrate the difference in detail between the three map scales.

 

Water24k.tab                                      Water.tab                                Water250k.tab

All the tables have one attribute data field: the name of the water feature if available.  

These are labeled from county/hydro/hydro24k, hydro100k, hyrdo250k tab files, which are the based on the same data however they represent just lines and therefore labels more consistently in MapInfo and Mapserver.

Natural Resource Data

County\NWI

National Wetlands Inventory

(NWI) data was developed by United States Fish and Wildlife Service from aerial photography. The data has very limited ground-truthing and is not a substitute for a wetland delineation. More information and public data download is available at or the local Natural Resource Conservation Service office.

NWI data near Crescent-H, overlaid on a USGS quadrangle.

Wildlife

County\Wildlife

There are three different folders (sources) for wildlife data on the server under County\Wildlife\

  1. Biota_1990's_data
  2. Teton Regional Land Trust Data
  3. WGF Layers

Wildlife data that is in the "County\Wildlife\Biota_1990's_data" folder. was originally developed by BIOTA Research and Consulting in 1990 under a Teton County contract and provided as a set of acetate overlays over 1:24,000 scale USGS quads. The University of Wyoming digitized the maps in 1997.  The following are from the University of Wyoming digitizing team. There are other versions and updates of this data, however, Teton County does not have these in a digital format at this time.

  • cutthrp.tab - Cutthroat spawning areas. This file cover only a 4 quadrangle area. I believe there are still some polygon label errors and edgematching errors.
  • deerp.tab - Deer seasonal ranges. Again, we used WGFD 100k maps to correct for errors in Biota's maps.
  • deer_ml.tab - Deer migration routes. We attempted to capture the arrows on the mylar overlays as arcs within Arc/Info and preserved their directionality.
  • elkp.tab - Elk seasonal ranges. This file has been cleaned up quite a bit (i.e., edgematching and incorrect polygon labels fixed). We used the 100k biggame seasonal range maps developed by the WGFD as a reference to fix a lot of the problems with the maps prepared by Biota.
  • elk_ml.tab - Elk migration routes. We attempted to capture the arrows on the mylar overlays as arcs within Arc/Info and preserved their directionality.
  • elk_pp.tab - Elk parturition areas. Again, we used WGFD 100k maps to correct for errors in Biota's maps.
  • moosep.tab - Moose seasonal ranges. Again, we used WGFD 100k maps to correct for errors in Biota's maps.
  • moose_l.tab - Moose migration routes. We attempted to capture the arrows on the mylar overlays as arcs within Arc/Info and preserved their directionality.
  • swanp.tab - Trumpeter swan breeding/staging areas. This layer has a bunch of polygon label errors and edgematching errors which we could not resolve.

Wildlife that is under County\Wildlife\Teton Regional Land Trust Data is in one of two folder depending on whether it's in Idaho or Wyoming.  This data was derived from IDFG and wildlife biologists at TRLT.  

Wildlife that is under County\Wildlife\WGF Layers is data from the Wyoming Game and Fish Department.   While we try to keep this data current, you can check for updates here: http://wgfd.wyo.gov/web2011/wildlife-1000811.aspx

Land Cover

County\Landcover

The land cover layer (primarily vegetation) was developed by the Wyoming Gap Analysis Project. Derived from classified Landsat satellite imagery and field verification. The data was developed at a scale of 1:100,000, so it is fairly course compared to other Teton County data. Care should therefore be exercised when overlaying it with other, more accurate, layers. Additional metadata: LandCover.htm

Vegetation

County\VegMapping

The vegetation layer was created by Cogan Technology for all private and BLM lands using a combination of image processing and photo interpretation of the vegetation communities using 2011-2012 aerial imagery.  The data was developed at a scale of 1:12,000.  Additional metadata: Vegetation.xml

Geology

Generalized Bedrock geologic data is in the "County\Geology\GeneralizedGeology" workspace. The data was developed in conjunction with the Wyoming Water Development Commission Level I Master Plan, described below.

 

Hazards

Land Slide data developed by the Wyoming State Geologic Survey is in the "County\Geology\LandSlides" workspace.

Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM) data is in the MapInfo FEMA workspace, or open the County\FEMA\FEMA.TAB layer into an existing workspace.

Please see FEMA.xl for details about this layer.

 Fire: Urban / Wildfire Interface fire evacuation areas are in the "County\Fire" folder. The data is in a single table named "Fire_Evacuation_Areas.tab" and there is also a workspace named "FireEvacuation.wor"

Jackson Lake Dam Failure Inundation Areas: The Bureau of Reclamation modeled the areas that would be inundated by flood in the event of a failure of the Jackson Lake dam. The folder "County\Bureau_Reclamation" contains both a workspace, and a table which can be added to other workspaces, that shows the inundated area that was taken from the August 1980 U.S. Bureau of Reclamation Jackson Lake Dam inundation maps. Drawing numbers 17-100-451 thru 17-100-456. Note that "The inundated area shown on this map reflect events of an extremely remote nature. These results are not intended to reflect upon the integrity of Jackson Lake Dam."

Wyoming Water Development Commission (WWDC)

The "County\WWDC" folder, and sub folders, contain complete data from the Wyoming Water Development Commission, Level -I, Teton County Master Plan prepared in 1998 by Jorgensen Engineering, et al. Please refer to the Read Me.doc Microsoft Word file in the County\WWDC folder, which gives a detailed overview of the contents of this folder. The data within this folder is not limited to GIS data. The folder is structured as follows:

  1. WORD Files
  2. EXCEL Files
  3. ACCESS Database
  4. AUTOCAD-CYBERNET Files
  5. GIS

The GIS folder includes 17 MapInfo workspaces that correspond to figures in the final report. Much of the GIS data is available elsewhere on this site; however, the Depth to Groundwater and Aquifer Sensitivity workspaces and associated data exist only in this folder.

County\Infrastructure contains three MapInfo tables from the WWDC Master Plan described above.

Infrastructure

Pipes, wells, tanks, and associated distribution system components of the public water systems.

SewerSystems

Sewer Districts.

Systems

Public Water System Districts.

Precincts

Voting precincts and polling places are in the County\Precinct folder.

Special Districts
County/special_districts

This data is generated by the Department of Revenue and maintained by the Assessors office.   Using the public mapserver info tool with the special districts layer turned on you can generate a list of owners for that particular special district.  

Environmental Assessments

County/Environmental_Assessments

An aggregation of past environmental assessment GIS data where available.

Dispatch

For use by dispatch

Emergency Management

For use by emergency management