NOTE: This file contains transcribers notes to accompany the original file (ec1_readme.txt).

This data is a conversion product and should not serve as the primary source for the complete geologic information for this area. To obtain complete information, please go to https://pubs.usgs.gov/of/2004/1361/.  This information may be found as referenced below:

Publisher:	U.S. Geological Survey	
Title:		Preliminary geologic map of the El Cajon 30' X 60' quadrangle, southern California
Author:		Todd, V.R., Alvarez, R.M., and Techni Graphic Systems, Inc
Original NGMDB identifier: 69595


Purpose: This file set is intended to make outdated Arc/INFO e00 files available as open-format shapefiles. No modification to files has been made. Projection was not changed. 

Process: e00 files were imported to coverage, then converted to shapefile using the ArcMap commands “Import from e00 (conversion)” and “Feature Class to Shapefile” respectively. Related tables were preserved by opening in ArcMap and exporting to txt.   

E00 files convert to (description extracted from ec1_readme.txt):
	ec1_geo.e00 (Contacts and faults) =
		ec1_geo_arc.shp
		ec1_geo_poly.shp
	ec1_str.e00 (Folds; attitudes and dip values) =
		ec1_str_annotation.shp
		ec1_str_point.shp
		ec1_str_arc.shp
	ec1_anno.e00 (Annotation subclasses) =
		ec1_anno_annotation.shp
		ec1_anno_annotation.fault.shp
		ec1_anno_annotation.geo.shp
		ec1_anno_annotation.mountain.shp
		ec1_anno_annotation.place.shp
		ec1_anno_annotation.valley.shp
		ec1_anno_annotation.water.shp
		ec1_anno_arc.shp
	ec1_arw.e00 (Landslide arrows) =
		ec1_arw_arc.shp


Original files included:
	ec1_readme.txt = readme
	ec1_met.txt = metadata

	
Modified: 8 February, 2024 by Karen Morgan, USGS contractor 
