 |
 |
 |
|
Re: quick techno question
The files *.e00 are ArcInfo interchange format, and can typically only be read by commercial software from ESRI (http://www.esri.com/). It's great stuff, but if you're just browsing, Sam DeVore's suggestion is the right way to go. ArcExplorer is a lightweight GIS viewer that works well for just looking at geographic data. But ArcExplorer can't read the .e00 files. They're like tar files so they need to be unpacked. A better solution is to go up and over to the directory ../shapefiles http://geology.cr.usgs.gov/pub/open-file-reports/ofr-02-0136/shapefiles/ Download all of those files. ArcExplorer can read these directly (click the "add layers" button and navigate to where you put the shapefiles). Right-click the layer to open a context menu, select Layer Properties to change the color or symbol of the data in that layer. Shapefiles are less technically sophisticated than .e00. They don't hold explicit geographic topology, like what lines connect to what other lines or which polygon is on each side of a line. But the shapefile format is published so more software is available to read files written in it. The interchange format is really designed for passing data from one ArcInfo user to another. More details about this particular map can be found at the same web site or at http://geo-nsdi.er.usgs.gov/metadata/open-file/02-136/metadata.faq.html If you back up to http://geo-nsdi.er.usgs.gov/, you'll see we've got a lot of data like this available. Please let me know if I can provide additional information or assistance. Peter
|
