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Guest monsterdivot

Terraserver and JD Cox Program

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There was a thread that "seemed" to indicate that the JD Cox YSA Photomaps program could extract color aerial photos from Terraserver. I have tried, and do not know how to do that. Mr. Cox's program seems to only produce black & white photos. The color images appear to only be available for a fee and USA Photomaps is not involved.Dick Boley @KLBE

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USA Photomaps uses USGS Orthophoto database, not TerraServer imagery. USGS does have some areas that are offered in BOTH BW and Color - try San Francisco area, and Cape Canaveral for sure... I'm not sure wether Photomaps checks if there is color imagery available...

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Hello Misho,The Microsoft Terraserver site is one of the authorized distributors of USGS images; it is all the same thing.Form Doug Cox' notes:USAPhotoMaps downloads U.S.Geological Survey aerial photos / topos from http://terraserver-usa.com/ (available at no charge, courtesy of Microsoft) and creates a map from them.Urban Areas can be downloaded from TerraServer by first selecting View -Map Type -Urban Areas on the Menu bar in USAPhotoMaps. Very few cities have these images yet (Washington, DC is one), but more are being added to the TerraServer website. These aerial photos can be displayed in USAPhotoMaps in 2 meters/pixel, 1 meter/pixel, 1/2 meter/pixel, and 1/4 meter/pixel. The downloaded images are all 1/4 meter/pixel resolution, but can be zoomed out.If a photo or topo map doesn't download, either there aren't any images available (possibly because you're past the edge of the current UTM Zone), in which case an X will fill the square, or it's not a JPEG image, in which case it will be saved in "DownloadError.htm" for you to read, or it was just a bad download, and you should try again. There's no photo data for Hawaii, and no topo data for Puerto Rico, and there's a lot of missing photo data in the contiguous U.S. You can check at http://terraserver-usa.com/ to see if a location has the photo or topo data you're looking for.Best regards.Luis

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Hi all.You can use terraserver directly to get an image in geographic projection ( lat-long format as required by resample ):http://terraserver.microsoft.com/ogcmap.as...ceptions=se_xmlOr go to:http://terraserver.microsoft.com/ogcwms.aspxUsing longitudes and latitudes forces geographic projection. DOQ is standard photo, DRG is topographic, or UrbanArea for finer datail where availble. Use EPSG:43262000 x 2000 pixels is a maximum ( I think ). But you could merge them in a paint program...Dick

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Hi all,I'm new to this forum and have a related question. I've been trying to access the high resolution, color, Urban Area imagery which seems to be available from TerraServer using the web services API. I can get the older 1 meter resolution B/W images without problem.Has anyone done this? I can't find any clues in the documentation given on the TerraServer site, http://terraserver-usa.com.Any help would be much appreciated.Thanks,Wayne Yee

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Erm - not sure I understand the question, but I'll give it a go.The Urban Area imagery is VERY limited in scope at this time. You may want to download J.D. Cox's USAPhotoMaps (http://www.jdmcox.com) and use it to insure that you, in fact, CAN get that image for the area you are interested in.I've yet to see any lists of what areas are in the Urban Area library. I know Providence is in the library, but the imagery doesn't extend all that far from the city - maybe 10-15 miles out or so. I'd imagine that if the imagery was available for your area, it would be listed as an option.(shrug!)-Greg

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I understand the limited coverage of the Urban Areas imagery. My question is more technical in nature. I can get at the Urban images just by using the TerraServer website. So, what's the problem, you're probably asking yourself. The problem is that I'm trying to access the images programmatically using the Web Services API (Application Program Interface) provided by Microsoft. This web service allows you to get at the data using a program. I'm trying to automate the access to imagery for over 20,000 locations. This is not something I want to spend the rest of my life doing manually, thus I'm writng an software application to do it. All the locations are stored in a database which the program can read. The application will handle the work of grabbing the images.Once again the problem is accessing the Urban Area images if they exist for a location. I can get the older, lower res., B/W images without problem.If anyone can help it is much appreciated.Thanks,Wayne

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