{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This point feature class shows the location of gravity base stations that have existed in Washington state. While observed gravity (on ISGN71 datum) is listed as well as other data pertaining to location and quality, WGS does not posses the precise position descriptions needed to reoccupy many of the stations. Stations where status and location are known are listed with much more thorough information in our Gravity Base Station layer. If you have information on the status and/or precise location of any of these stations, WGS staff would greatly appreciate hearing from you.", "description": "

A gravity base station is a point on Earth's surface where the absolute value of gravity is well known. Gravity base stations are established to tie relative gravity measurements to an accepted gravity value that has been determined through the use of an absolute gravimeter, or repeated relative measurements to another established base station. They are sometimes also used to measure changes in Earth's gravity over time. Scientists can use repeated measurements at established gravity base stations during the course of a relative gravity survey to determine, account for, and remove instrument drift from relative gravity measurements. <\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "This point feature class shows the location of gravity base stations that have existed in Washington state. While observed gravity (on ISGN71 datum) is listed as well as other data pertaining to location and quality, WGS does not posses the precise position descriptions needed to reoccupy many of the stations. Stations where status and location are known are listed with much more thorough information in our Gravity Base Station layer. If you have information on the status and/or precise location of any of these stations, WGS staff would greatly appreciate hearing from you.", "title": "Legacy Gravity Base Station Data", "tags": [ "gravity meters", "density", "elevation", "observed gravity", "theoretical gravity", "terrain correction", "bouguer correction", "curvature correction", "free air correction", "complete bouguer anomaly", "isostatic correction" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "", "licenseInfo": "

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<\/P><\/DIV><\/DIV><\/DIV>,

The Washington Geological Survey (WGS) shall not be held liable for improper or incorrect use of the data described and/or contained herein. This product is provided 'as is' without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular use. The Washington State Department of Natural Resources and the authors of this product will not be liable to the user of this product for any activity involving the product with respect to the following: (a) lost profits, lost savings, or any other consequential damages; (b) the fitness of the product for a particular purpose; or (c) use of the product or results obtained from use of the product. Although these data have been processed successfully on computers of WGS, no warranty, expressed or implied, is made by WGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.<\/SPAN><\/P><\/DIV><\/DIV>", "portalUrl": "" }