EDM Data Format

Long Valley Caldera 2-Color EDM Data

This report contains 2-color EDM data (monitoring horizontal deformation) collected by the USGS in Long Valley Caldera between 1984 and 2002.

The data are provided in ASCII, DBaseIV files and ArcView shapefiles format.
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ASCII format files

Directory	MonitoringData/Geodetic/EDM/SpreadsheetFormatData
File	edm_bm.txt	2-color EDM benchmarks
File	edm_data.txt	2-color EDM geodetic data
File	edm_lines.txt	2-color EDM baselines

Z-units	Change	mm
Z-units	Error	mm
Z-units	Distance	m

Map projection	Geographic
Datum	NAD27
Units	DD and DMS

ArcView shapefiles format

Data are provided in ArcView shapefiles that can be used in a number of GIS and visualization software packages.

Directory	MonitoringData/Geodetic/EDM		FGDC Metadata
File	edm_bm.shp	2-color EDM benchmarks (points)	benchmarks
File	edm_lines.shp	2-color EDM baselines (lines)	baseline

Z-units	Change	mm
Z-units	Error	mm
Z-units	Distance	m

Map projection	UTM
Datum	NAD27
Units	Meters

Download files to desktop
1. Go to the MonitoringData/Geodetic/EDM folder to download the data

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