20260327
00263100
1.0
FALSE
Land_Base_Contours_Subsidence
002
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Texas_South_Central_FIPS_4204_Feet
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20260327
03115800
20260327
03115800
Esri ArcGIS 13.1.2.41833
Land_Base_Contours_Subsidence
<DIV><P>This layer was last updated: 2026-03-27 00:26:33.142805.</P></DIV>
Estimated subsidence in feet from 1906-2016 using measured land surface elevation change at benchmarks surveyed in 2000 and estimated annual subsidence rates from 2011-2016 at HGSD GPS subsidence network assuming a constant rate of subsidence from 2010-2016. Subsidence has occurred throughout the region has a result of groundwater development. Data source: Thompson, Robert, William M. Chrismer, and Christina Petersen. May 2019. 2018 Annual Groundwater Report. Harris-Galveston Subsidence District https://hgsubsidence.org/wp-content/uploads/2019/11/2018-HGSD-Annual-Groundwater-Report.pdf. District surveys and active monitoring shows estimated subsidence magnitudes greater than 1 foot since 1906 exists in all adjacent counties. Disclaimer: This product is for informational purposes only and may not be suitable for legal, engineering, or surveying purposes. It does not represent an official survey and represents only the approximate relative location of features and boundaries. Mapping may not necessarily reflect on-the-ground conditions. This product and those involved in its production make no claims as to the accuracy or reliability of the data, and neither assumes, nor will accept liability for their use.
Enterprise Geodatabase Feature Class
dataset
EPSG
6.11(9.0.0)
0
Simple
FALSE
0
TRUE
FALSE
Land_Base_Contours_Subsidence
Feature Class
0
OBJECTID
OBJECTID_1
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
SUBSIDENCE
Subsidence (ft)
Double
8
38
8
Shape.STLength()
Shape.STLength()
Double
0
0
0
20260327