RE: [compass-users] Access to Digital Terrain Models to load to COMPASS?
Hi Rich,
Sorry this had taken so long, but I have
finally fixed the problem with your DEM files. (I had a bit of a disk crash in
the middle of things and I had to reinstall Windows, which slowed things down.)
There were two basic problems with your
DEM data. First, there were some anomalies along the border of your DEM's. This
is a common occurrence with these public DEM's and I just needed to write some
code to circumvent the problem. (I have lots of patches in the code to
circumvent problems like this.) The second problem was that these 10-meter
files are bigger than other DEM files I have seen. As a result, the some of the
columns contained more data than my arrays could hold. I just needed to expand
the arrays.
I also made some other changes to the
DEMReader to make it a bit more user friendly. The Linking Window now uses more
friendly selection boxes and cursor positioning tools. However, since this is
fairly fresh code, there is a possibility that I have introduced some new bugs,
so please let me know if you see anything that doesn't seem to work right.
At any rate, there is a new version on the
web site here:
(By the way, I'm working on a new DEM
reading tool that will make the merging much easier. It will probably be
incorporated directly in the Project Manager or Viewer to make it easier to
use.)
Let me know if you have any questions or
comments.
Larry
From:
compass-users@yahoogroups.com [mailto:compass-users@yahoogroups.com] On Behalf Of Aram, Richard B Sent: Monday, March 23, 2009 6:25
AM To: compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
Hi Larry,
No problem, I very much appreciate your
help
Rich
From:
compass-users@yahoogroups.com [mailto:compass-users@yahoogroups.com]
On Behalf Of Larry Fish Sent: Monday, March 23, 2009 6:24
AM To: compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
Rich,
I just wanted to let you know I’m still work on fixing
the problem with your files. I should have something for you soon.
Larry
From:compass-users@yahoogroups.com
[mailto:compass-users@yahoogroups.com] On Behalf Of Aram,
Richard B Sent: Thursday, March 19, 2009
6:29 AM To:compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
hi Larry.
OK, here ya go, and thanks for your continued good help
JeffersonIsland is on the west, Sappington on the east
Rich
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From:compass-users@yahoogroups.com
[mailto:compass-users@yahoogroups.com] On Behalf Of Larry Fish Sent: Wednesday, March 18, 2009
9:14 PM To:compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
Rich,
The problem is probably caused by anomalies in the files
right at the edge between the two maps. For example, if the edge of one map has
250 points and the edge of the adjacent map has 270, the program has a problem
trying to resolve the difference. (I have seen very strange data in these
files.)
Send me the two DEM files and I will look at data and try to
make changes in the DEM Reader that will handle the problem. I have been
successful at doing this in the past.
Please zip both files and send them to this email address:
It has a large in-box and won’t reject large files.
Larry
From:compass-users@yahoogroups.com
[mailto:compass-users@yahoogroups.com] On Behalf Of Aram,
Richard B Sent: Wednesday, March 18, 2009
8:02 PM To:compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
Hi Larry,
Thanks very much for your usual very prompt and thorough
help.
I successfully located and loaded a DEM from
GeoCommunity. Unfortunately, the area of interest was right on the seam
between two maps, but lo and behold, you already anticipated that and had a
good fix available in your DEM Reader. I haven't been able to get to that
work yet: I get an error message, I/O Error 103. Do you have a
translation or recommendation for me to try? Both files will load and
display successfully by themselves.
thanks!
Rich Aram
size=2
width="100%" align=center tabIndex=-1>
From:compass-users@yahoogroups.com
[mailto:compass-users@yahoogroups.com] On Behalf Of Larry Fish Sent: Saturday, March 14, 2009
2:21 AM To:compass-users@yahoogroups.com Subject: RE: [compass-users]
Access to Digital Terrain Models to load to COMPASS?
Rich,
I sent most of this information in a private email, but I
thought some of the other cavers might benefit from these answers.
Thanks for your letter. I have updated the links on the
Compass web page and rewritten a section that gives detailed information on how
to download and use the DEM files. I would start by reading this section of the
Compass web page:
I think you should be able to find all the DEM files you
need for Lewis and Clark Caverns. If you have any problems the quadrangles, let
me know which ones you need. They are usually specified by the same names used
for the 7.5-minute topographic maps.
If you have any other questions, feel free to write.
Larry
From:compass-users@yahoogroups.com
[mailto:compass-users@yahoogroups.com] On Behalf Of Aram,
Richard B Sent: Friday, March 13, 2009 3:41
PM To:compass-users@yahoogroups.com Subject: [compass-users] Access to
Digital Terrain Models to load to COMPASS?
I
wish to load a Digital Terrain Model to our maps of Lewis and Clark Caverns in Montana.
The link from COMPASS to the USGS site does not appear to work, so the USGS
probably changed something. I plan to spend some time hunting it down,
but I also hope other users can offer some suggestions and help if they have
used it recently.
I wish to load a Digital Terrain Model to our maps of Lewis and Clark Caverns in Montana. The link from COMPASS to the USGS site does not appear to work, so...
Rich, I sent most of this information in a private email, but I thought some of the other cavers might benefit from these answers. Thanks for your letter. I...
Hi Larry, Thanks very much for your usual very prompt and thorough help. I successfully located and loaded a DEM from GeoCommunity. Unfortunately, the area of...
Rich, The problem is probably caused by anomalies in the files right at the edge between the two maps. For example, if the edge of one map has 250 points and ...
hi Larry. OK, here ya go, and thanks for your continued good help Jefferson Island is on the west, Sappington on the east Rich ________________________________...
Hi Rich, Sorry this had taken so long, but I have finally fixed the problem with your DEM files. (I had a bit of a disk crash in the middle of things and I had...
hi Larry, Thanks! It's no problem that you didn't do this instantly: your service is still quite remarkable. Did you meant to send an attachment of the zipped...
Rich, ... Basically, I fixed the Merge-Tool in the DEM Reader so it will merge the two DEM files you sent. That will allow you to create a new DEM that...
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