You're on the right track. If you have obtained a an ESRI GRID representing a DEM in an e00 format, then with GDAL and/or GRASS you can convert from ESRI GRID (e00) to USGS DEM format, with the workflow Hamish outlined previously.<br>
<br>ESRI data is in binary raster/vector formats when ESRI software is reading/writing data. Your e00 is an ASCII export format of the binary GRID (e00's are also for arc/info coverage vector exports). e00's were intended to export raster and vector data from arc/info workspaces for importing into other ones, because you cant easily copy/move/share datasets in the native format. ESRI GRIDS use a directory for the spatial component in a directory, linked to attribute data in a separate INFO directory which has all the workspace attributes in it. e00's grab relavant attributes from the INFO directory and package them with the spatial data from another directory, into one ASCII e00 file (or if specified e00, e01, etc.)<br>
<br>Best of luck.<br>Mark<br><br><div class="gmail_quote">On Sun, Mar 1, 2009 at 10:26 AM, Illidan <span dir="ltr"><<a href="mailto:illidan.modeler@gmail.com">illidan.modeler@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I'm overall new to GIS. But my work has to rely on USGS DEM formatted<br>
data, so I cannot run away.<br>
<br>
However, I'm only fortunate enough to get DEM data in ESRI ASCII<br>
format. That's why I have to do a conversion.<br>
<br>
<a href="http://en.wikipedia.org/wiki/ESRI_grid" target="_blank">http://en.wikipedia.org/wiki/ESRI_grid</a><br>
<br>
I guess ESRI ASCII format is well-known to GIS guys. Maybe I made a<br>
mistake mixing e00 up with ESRI ASCII. A friend of mine, who is now a<br>
newbie GIS engineer, told me that ESRI ASCII was the same thing as e00<br>
file.<br>
<div><div></div><div class="Wj3C7c"><br>
<br>
<br>
On Sun, Mar 1, 2009 at 7:29 PM, MS <<a href="mailto:mseibel@gmail.com">mseibel@gmail.com</a>> wrote:<br>
> e00s can contain all the formats Hamish mentioned. I think the question<br>
> was more about the type of data the e00 contains.<br>
><br>
> Mark<br>
><br>
> On Mar 1, 2009, at 6:06 AM, Illidan <<a href="mailto:illidan.modeler@gmail.com">illidan.modeler@gmail.com</a>> wrote:<br>
><br>
>> On Sun, Mar 1, 2009 at 4:05 PM, Hamish <<a href="mailto:hamish_b@yahoo.com">hamish_b@yahoo.com</a>> wrote:<br>
>>><br>
>>> Illidan wrote:<br>
>>>><br>
>>>> I'm trying a conversion of from ERSI Grid ASCII(e00) to legacy USGS<br>
>>>> DEM that one old piece of software I'm using supports. I searched the<br>
>>>> web and only got results about the reverse conversion, i.e. USGS<br>
>>>> DEM==> e00. So I ask for help here. I appreciate any feasible work<br>
>>>> flow or hint on an existing conversion software.<br>
>>><br>
>>> $ gdalinfo --formats | grep USGS<br>
>>> DOQ1 (ro): USGS DOQ (Old Style)<br>
>>> DOQ2 (ro): USGS DOQ (New Style)<br>
>>> ISIS3 (ro): USGS Astrogeology ISIS cube (Version 3)<br>
>>> ISIS2 (ro): USGS Astrogeology ISIS cube (Version 2)<br>
>>> USGSDEM (rw): USGS Optional ASCII DEM (and CDED)<br>
>>><br>
>>> (see <a href="http://gdal.org" target="_blank">gdal.org</a>)<br>
>>><br>
>>> hopefully you want USGSDEM? if so import to GRASS with v.in.e00 and<br>
>>> do what you have to do to get into raster format before running<br>
>>> "r.out.gdal format=USGSDEM". what is the nature of the e00 file?<br>
>>> contour lines? TIN? points? ascii-grid of some sort?<br>
>><br>
>> Thanks for you reply. I'll try what you suggest.<br>
>><br>
>> e00 is plain text file containing raster data, developed by ESRI. It<br>
>> contains headers of about six lines, followed by raster data for each<br>
>> cell. Its format is somewhat similar to USGS DEM.<br>
>><br>
>><br>
>>><br>
>>><br>
>>> Hamish<br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>>><br>
>><br>
>><br>
>><br>
>> --<br>
>> Illidan<br>
>> Networking System Modeler<br>
>> Northern Capital, Republic of Pandaren<br>
>> <a href="http://illidan.go.3322.org" target="_blank">http://illidan.go.3322.org</a><br>
>> _______________________________________________<br>
>> grass-user mailing list<br>
>> <a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>
>> <a href="http://lists.osgeo.org/mailman/listinfo/grass-user" target="_blank">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br>
><br>
<br>
<br>
<br>
--<br>
Illidan<br>
Networking System Modeler<br>
Northern Capital, Republic of Pandaren<br>
<a href="http://illidan.go.3322.org" target="_blank">http://illidan.go.3322.org</a><br>
</div></div></blockquote></div><br>