DEM Band Value Incorrect

When I clip in FME it gives this error:

USGS_DEM Writer: The maximum number of decimal places allowed for the format attribute 'dem_spatial_resolution_z' when expressed in 'FEET' is 1. The value '0.0014411999999999999' must be reduced to 1 decimal place(s)

A fatal error has occurred. Check the logfile above for details

... Last line repeated 2 times ...

the attached zip the band is at a zero precision, that is the only way I could clip and export. The attached screen shot shows what the elevation should be in this area. Let me know if this helps.correect-elev.png

If you want to take a look at the original DEM here is the link:

ftp://data.ga.lsu.edu/lidar/2000_state/la_lidar_dem/2909001ne_dem.zip

The attached shapefile is of the area of interest that the screen shot I sent shows elevation of -0.3' and FME reads different. When I clip the DEM it changes the value so I cannot send a clipped area of the DEM.

Thanks,

Chad

dem-clip.zip

Hi @tbs_gis_team,

Thanks for reporting this to us and providing your sample datasets. A developer confirmed that it looks like our USGS_DEM Reader isn't applying the elevation of the local datum to individual elevation values within a profile. I've opened up a case for you, for which you should have received a notification email.

I'm glad to report that the fix for this issue has been included in the latest FME release (FME 2018.1.0.2, build 18547). Thanks @tbs_gis_team for bringing this to our attention, and for helping us make FME even better!