GeoTiff Aerial/Satellite Photo Source?

[nudata 10]

I have had very good results creating photo textures from the Terraserver/JD Cox program. I use the conversion program in SBuilder to convert UTM to LAT/LON decimal. 1. use Ifran (free) to go from jpg to tif.2. Use Geo Tiff Tools to insert the millennium geotiff tags.3. Use GeoTiff Examine to enter the LAT/LON and pixel size.4. Put the proper name in the INF file, Resample and it works.Now I want to use NAIP NAD83 Pennsylvania type S files. More jargon...1. Convert the NAD83 to WGS84 using Viewfinder which now works but takes forever.2. Use GeoTiff Tools to insert millennium tags.3. Use GeoTiff Examine to enter the decimal LAT/LON and pixel size.Results below. Microsoft's move to TIF is a pain..GLOBAL MAPPERhttp://forums.avsim.net/user_files/161855.jpgTMFVIEWERhttp://forums.avsim.net/user_files/161856.jpgFSXhttp://forums.avsim.net/user_files/161857.jpg

[Guest player1]

"1. Convert the NAD83 to WGS84 using Viewfinder which now works but takes forever."Hi,Nice work!Are you sure that besides WGS84 that you are also converting to Geo/LatLon? Your pics do not look like the persice positioning that you should be getting if you are.

[rhumbaflappy 113]

Hi Dick.>Microsoft's move to TIF is a pain..Microsoft didn't move to Geotiff, you did. You can still use the old terms to resample bitmaps, untagged tiffs, Targa.There seems to be a lot of confusion about using GeoTiffs. They are not required, and to make one takes more effort than simply using a bitmap.ALL these formats still require Lat-Long ( geographic ) projection, with WGS84 datum. And you are required to provide the bounds, cell distances, etc... just as we have for years. If you already have a geotiff, then use it.Dick

[nudata 10]

My problem was that I became too clever and used Viewfinder to try to convert NAD83 Pennsylvania-Plane S to WGS84. The program mangled the data apparently. Anyhow, I simply used the original NAD83 etc. file with the Millennium TAGs and it worked. Took 9 minutes to re-sample a 286mb file. The alignment to the original Microsoft river was excellent. This is heartening in that the process worked and that the rivers in Microsoft are quite accurate.Dick near 5G8

[scott967 62]

>Hi Dick.>>>Microsoft's move to TIF is a pain..>>Microsoft didn't move to Geotiff, you did. You can still use>the old terms to resample bitmaps, untagged tiffs, Targa.>>There seems to be a lot of confusion about using GeoTiffs.>They are not required, and to make one takes more effort than>simply using a bitmap.>>ALL these formats still require Lat-Long ( geographic )>projection, with WGS84 datum. And you are required to provide>the bounds, cell distances, etc... just as we have for years.>If you already have a geotiff, then use it.>>DickTrue but it appears to get proper water masking you need to have a 5 channel image, so you need an image format that can support that.scott s..

[rhumbaflappy 113]

Hi Scott.You still don't need GeoTiffs... regular Tiffs or Targa files should work just fine.All I'm writing is that making a Tiff into a GeoTiff is an extra step we can avoid by writing the bounds and cell-spacing in the INF file.We can also use BMPs if we specify separate files as the watermask and blend channels, avoiding the use of Alpha channels altogether.Dick

[scott967 62]

thanks. I see that now with multisource you can just use grayscale images for the extra channels.scott s..