Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data
NGDB rock geochemistry: https://mrdata.usgs.gov/ngdb/rock/search-bbox.php?xmin=-109.25&ymin=36.75&xmax=-108.75&ymax=37.25 National Geochemical Survey sediment geochemistry: https://mrdata.usgs.gov/geochem/search-bbox.php?xmin=-109.25&ymin=36.75&xmax=-108.75&ymax=37.25 NURE-HSSR sediment geochemistry: https://mrdata.usgs.gov/nure/sediment/search-bbox.php?xmin=-109.25&ymin=36.75&xmax=-108.75&ymax=37.25 NURE-HSSR water geochemistry: https://mrdata.usgs.gov/nure/water/search-bbox.php?xmin=-109.25&ymin=36.75&xmax=-108.75&ymax=37.25Each of these URLs will return an XML document containing reports from records of samples located near Four Corners, where Arizona, Utah, New Mexico, and Colorado meet. The bounding coordinates are specified as
xmin = -109.25 ymin = 37.25 xmax = -108.75 ymax = 36.75These numbers are expressed in the usual way in a web site URL, by omitting spaces and by separating each variable with an ampersand (&).
geochem-addin.zip (1.2MB zip file expands to 7.4MB)The package contains four file geodatabases, the add-in itself GeoChemaddin.esriaddin, and a map description file USGS Geochem.mxd. Double-click the addin to install in ArcGIS 10.
With the GeoChem addin installed, open USGS Geochem.mxd, zoom to the geographic area you are interested in, and click the GeoChem icon in the toolbar, a flask symbol. That will bring up a dialog asking you which of the GeoChemical databases you wish to include within the geographic extent of your data frame.
After clicking the button on the form to get data, you should see geochemical sample locations on the map. These you can examine by using the identify tool and clicking individually. A few attributes are provided in the geodatabase for refined selection and symbolization, but most of the details of individual site records are obtained by clicking the URL provided in the Online Report data field. That should open a web browser and display the full report of that site from the appropriate geochemistry database.
This addin should be considered experimental at this point (Fall 2011). Please let us know if you encounter difficulties with it by sending email to Peter Schweitzer.