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NAD 83 imagery

dave hoeffgen

dave hoeffgen

Resource contributor
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germany
Hi,
I recently downoladed some aerial imagery from the USGS servers abd resampled it to create photo scenery.
As the source imagery is projected in NAD 83 format, not in WGS 84 there is some noticable distortion in the result.

Is there a tool to convert/reproject the image?

Thanks in advance for any help,
Dave
 
Hi Dave:

AFAIK, MSFS / P3D Resample would not have accepted the aerial imagery unless it was already "projected" to WGS84. :scratchch


Assuming you downloaded in GeoTIFF format, have you tried to use the aerial imagery in SBuilderX via the "Add Map From Disk" feature, which may be able to internally re-project the file(s) to Geographic (Lat-Lon) and WGS84 ...for use with MSFS / P3D Resample ? :idea:

http://www.ptsim.com/forum/viewtopic.php?p=6606


Hope this helps ! :)

GaryGB
 
Last edited:
I guess I have to hit the GeoTiff button in the calibrate panel?

That's what I tried first but it just prompted a GDI+ error message and then the image was completely misaligned.

Then also SBX did not let me compile.
 
You need to re-project it, use osgeo4w.

gdalwarp -of GTiff -co "INTERLEAVE=PIXEL" -t_srs "+proj=latlong +datum=WGS84" -r cubic "Original.tif" "Original_WGS84.tif"
 
FYI: Quantum GIS (aka "QGIS") {freeware} has a GUI which offers integration with many optional plugins:

https://docs.qgis.org/2.6/en/docs/index.html

https://docs.qgis.org/2.6/en/docs/user_manual/plugins/plugins_index.html


The QGIS GUI can be used to perform the above CMD shell translation / re-projection using the "GDAL Tools plugin":

https://docs.qgis.org/2.2/en/docs/user_manual/plugins/plugins_gdaltools.html


"The GDAL Tools plugin offers a GUI to the collection of tools in the Geospatial Data Abstraction Library, http://gdal.osgeo.org . These are raster management tools to query, re-project, warp and merge a wide variety of raster formats. Also included are tools to create a contour (vector) layer, or a shaded relief from a raster DEM, and to make a VRT (Virtual Raster Tile in XML format) from a collection of one or more raster files.

These tools are available when the plugin is installed and activated."


Hope this helps make such procedures easier for those who do not use other GUI-based GIS utilities such as ex: Global Mapper {payware}. :)


PS: For future reference with use of SBuilderX: :idea:

https://www.google.com/#q=SBuilderX GDI+ error



Also, try using the newest SBuilderX version 3.14 (32-bit or 64-bit) from: ;)

http://www.fsdeveloper.com/forum/threads/sbuilderx.5596/

GaryGB
 
Last edited:
Shaun said:
You need to re-project it, use osgeo4w.

gdalwarp -of GTiff -co "INTERLEAVE=PIXEL" -t_srs "+proj=latlong +datum=WGS84" -r cubic "Original.tif" "Original_WGS84.tif"
Click to expand...

Sorry for the late reply but now that I finally found the time to give it a try it worked nicely. Thanks a lot for this information. :)
 
To add on to this thread:

I have approximately 15 .jp2 files from the USGS that I need reprojected to WGS84. How would I go about writing a batch file to reproject all of the files without having to do each one by one?

Thanks
 
To add on to this thread:

I have approximately 15 .jp2 files from the USGS that I need reprojected to WGS84. How would I go about writing a batch file for GDAL to reproject all of the files without having to do each one by one?

Thanks
 
I don't know. Reprojecting them in the aforementioned way doesn't work. Perhaps pm Arno to draw his attention here. I bet he has an inkling.
 
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