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Service Description: <div style='text-align:Left;font-size:12pt'><div><div><p><span>These are the official TWDB Groundwater Modeling Department's administrative boundary GIS datasets. These administrative boundaries are used by the TWDB Groundwater Modeling Department, Groundwater Management Areas (GMAs), and local Groundwater Conservation Districts (GCDs) to summarize information from the TWDB Groundwater Availability Models (GAMs). </span></p><p><span /></p><p><span>The GAM grids are intersected with these datasets in order to assign administrative boundaries to all GAM grid cells within the model footprint. Modeled Available Groundwater (MAGs) and groundwater budgets are provided to stakeholders using these administrative boundaries.</span></p><p><span /></p><p><span>Some of the original source administrative boundaries were obtained from sources outside of TWDB as documented in the metadata for each dataset. Some of the original boundaries were revised from original source datasets so that any shared boundaries between datasets match. For example, if a GCD boundary follows a county line we ensured that both the GCD and County datasets matched exactly where they shared this boundary. This was done to remove small gaps and slivers between datasets which can cause errors when assigning administrative boundaries to GAM grid cells. </span></p><p><span /></p><p><span>These administrative polygon feature classes are intended specifically for GAM use and should not be used for any private or legal boundary purposes. TWDB has edited the administrative feature class polygons to more accurately overlay with spatially coincident boundaries between the administrative boundary datasets. The polygon edits may also include adjustments to better align with the intended physical geographic boundaries using high resolution Google based imagery. </span></p></div></div></div>

Map Name: GM_Admin_Boundaries

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• GM_MajorBasins (0)
• GM_PGMAs (1)
• GM_GMAs (2)
• GM_Counties (3)
• GM_GCDs (4)
• GM_RWPAs (5)
• GM_MinorAquifers (6)
• GM_MajorAquifers (7)
• GM_ClimateDiv (8)
• GM_BEG_Physiography (9)
• GM_RiverAuthorities (10)
• GM_State (11)
• GM_Adjacent_Bounds (12)

Description: These are the official TWDB Groundwater Modeling Department's administrative boundary GIS datasets. These administrative boundaries are used by the TWDB Groundwater Modeling Department, Groundwater Management Areas (GMAs), and local Groundwater Conservation Districts (GCDs) to summarize information from the TWDB Groundwater Availability Models (GAMs). The GAM grids are intersected with these datasets in order to assign administrative boundaries to all GAM grid cells within the model footprint. Modeled Available Groundwater (MAGs) and groundwater budgets are provided to stakeholders using these administrative boundaries.Some of the original source administrative boundaries were obtained from sources outside of TWDB as documented in the metadata for each dataset. Some of the original boundaries were revised from original source datasets so that any shared boundaries between datasets match. For example, if a GCD boundary follows a county line we ensured that both the GCD and County datasets matched exactly where they shared this boundary. This was done to remove small gaps and slivers between datasets which can cause errors when assigning administrative boundaries to GAM grid cells. These administrative polygon feature classes are intended specifically for GAM use and should not be used for any private or legal boundary purposes. TWDB has edited the administrative feature class polygons to more accurately overlay with spatially coincident boundaries between the administrative boundary datasets. The polygon edits may also include adjustments to better align with the intended physical geographic boundaries using high resolution Google based imagery.

Service Item Id: fa0fe633de77411aa4ad823a9f38efe1

Copyright Text: TWDB Groundwater Modeling Department

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Document Info:

Title: Groundwater Modeling Administrative Boundaries
Author:
Comments: These are the official TWDB Groundwater Modeling Department's administrative boundary GIS datasets. These administrative boundaries are used by the TWDB Groundwater Modeling Department, Groundwater Management Areas (GMAs), and local Groundwater Conservation Districts (GCDs) to summarize information from the TWDB Groundwater Availability Models (GAMs). The GAM grids are intersected with these datasets in order to assign administrative boundaries to all GAM grid cells within the model footprint. Modeled Available Groundwater (MAGs) and groundwater budgets are provided to stakeholders using these administrative boundaries.Some of the original source administrative boundaries were obtained from sources outside of TWDB as documented in the metadata for each dataset. Some of the original boundaries were revised from original source datasets so that any shared boundaries between datasets match. For example, if a GCD boundary follows a county line we ensured that both the GCD and County datasets matched exactly where they shared this boundary. This was done to remove small gaps and slivers between datasets which can cause errors when assigning administrative boundaries to GAM grid cells. These administrative polygon feature classes are intended specifically for GAM use and should not be used for any private or legal boundary purposes. TWDB has edited the administrative feature class polygons to more accurately overlay with spatially coincident boundaries between the administrative boundary datasets. The polygon edits may also include adjustments to better align with the intended physical geographic boundaries using high resolution Google based imagery.
Subject: These are the official TWDB Groundwater Modeling Department's administrative boundary GIS datasets. These administrative boundaries are used by the TWDB Groundwater Modeling Department, Groundwater Management Areas (GMAs), and local Groundwater Conservation Districts (GCDs) to summarize information from the TWDB Groundwater Availability Models (GAMs).
Category:
Keywords: GAM,GM,Groundwater Modeling,TWDB,Counties,GMAs,Groundwater Management Areas,GCDs,Groundwater Conservation Districts,PGMAs,Priority Groundwater Management Areas,RWPAs,Regional Water Planning Areas,Aquifers,River Basins,River Authorities
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