MapWindow 4 - Desktop Application : MapWindow Discussion Forum
Hello, I am pretty new to the GIS world and am trying to self teach on MW. I have developed a basemap with various land ownership/usage data, topographic maps, and aerial photos. I would like to add some sort of DEM to the database to use in conjuction with the other files I have i
DEM Projection/Usage/Error Messages
Posted by:
MT user ()
Date: July 08, 2010 04:48PM
Hello,
I am pretty new to the GIS world and am trying to self teach on MW. I have developed a basemap with various land ownership/usage data, topographic maps, and aerial photos. I would like to add some sort of DEM to the database to use in conjuction with the other files I have in the basemap. I went on to the Montana GIS portal website and they have the USGS DEM at the following website - [nris.state.mt.us]. Now when try to add these DEM files into MW i get the following messages (1) "Conversion from string "04 17" to type 'Double' is not valid." and (2) "Error in ImportDEMFormat importing C...\File path\Object reference not set to an instance of an object." I am not sure what either of these mean.
After I hit ok on both of the messages the DEM loads into MW, but does not project to my current basemap - which is in State Plane Coordinates - FIPS 2500. It appears very small in comparison to the basemap. The website I got DEM from gave some pointers to adjust the files for non-Arc programs but neither of those worked.
I realize it is most likely user error, but any insight into these issues would be great, Thanks!
I am pretty new to the GIS world and am trying to self teach on MW. I have developed a basemap with various land ownership/usage data, topographic maps, and aerial photos. I would like to add some sort of DEM to the database to use in conjuction with the other files I have in the basemap. I went on to the Montana GIS portal website and they have the USGS DEM at the following website - [nris.state.mt.us]. Now when try to add these DEM files into MW i get the following messages (1) "Conversion from string "04 17" to type 'Double' is not valid." and (2) "Error in ImportDEMFormat importing C...\File path\Object reference not set to an instance of an object." I am not sure what either of these mean.
After I hit ok on both of the messages the DEM loads into MW, but does not project to my current basemap - which is in State Plane Coordinates - FIPS 2500. It appears very small in comparison to the basemap. The website I got DEM from gave some pointers to adjust the files for non-Arc programs but neither of those worked.
I realize it is most likely user error, but any insight into these issues would be great, Thanks!
Re: DEM Projection/Usage/Error Messages
Posted by:
pmeems ()
Date: July 12, 2010 02:19AM
I must say I'm not very familiar with DEM files, but the errors you get are not very user friendly.
Can you submit an issue report in Mantis our issue tracker and refer to this post and add the link to download the DEM files?
Thanks,
Paul
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Paul Meems
The Netherlands
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Release manager, configuration manager and
forum moderator of MapWindow GIS
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Dutch speaking users: www.mapwindow.nl
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Can you submit an issue report in Mantis our issue tracker and refer to this post and add the link to download the DEM files?
Thanks,
Paul
--
Don't forget to read the new documentation: www.mapwindow.org/documentation/mapwingis4.8
Join us Google+: MapWindow GIS Google+ Community
Join the MapWindow Group on LinkedIn! LinkedIn - MapWindow Group
Download the latest beta installer at:
tinyurl.com/mwMonthly 32-Bit
tinyurl.com/mwMonthlyx64 64-Bit
Follow me on Twitter MapWindow_nl to read when a new installer is published.
---
Paul Meems
The Netherlands
[www.bontepaarden.nl]
Release manager, configuration manager and
forum moderator of MapWindow GIS
Owner of MapWindow.nl - Support for
Dutch speaking users: www.mapwindow.nl
*******
Everything I say or write is my personal opinion and
not the opinion of the company I work for.
*******
View my profile on LinkedIn
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