Distorted DEM files
zavadil
Posts: 2
Hello
I have always had trouble with Global Mapper distorting my files vertically. For example, our county is 42 across and 30 miles north-south. When I download the county 2M DEM and measure it with the Global Mapper tool it measures 42 x 30 miles, however the actual area I am looking at is only 42 x 15 miles. The Y axis is stretched by a factor of 2. The shape of the county appears correct but I only have half the data. The bottom half is chopped off and the remaining top half of the county stretched to the proper outline of the county. Do I have a setting wrong?
Dave
I have always had trouble with Global Mapper distorting my files vertically. For example, our county is 42 across and 30 miles north-south. When I download the county 2M DEM and measure it with the Global Mapper tool it measures 42 x 30 miles, however the actual area I am looking at is only 42 x 15 miles. The Y axis is stretched by a factor of 2. The shape of the county appears correct but I only have half the data. The bottom half is chopped off and the remaining top half of the county stretched to the proper outline of the county. Do I have a setting wrong?
Dave
Comments
What on-line data source are you using to download the DEM? What bounds did you specify?
This is the link to the data source. It is the Knox2m.zip link.
http://dnr.nebraska.gov/embedded-ftp-folder?id=dems/LiDAR_2011
The Meta data is at this link http://dnr.nebraska.gov/2011-lidar-nrcs-metadata