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What datum is best for Swedish maps?

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What datum is best for Swedish maps? Empty What datum is best for Swedish maps?

Post  olhe on Tue Jan 04, 2011 7:45 am

My Swedish maps has this line in Ozi calibration map file:

RT90,WGS 84, 0.0000, 0.0000,WGS 84

Orux cannot use RT90 so I used WGS 84 and UTM instead but I get a W/E fault of about 150 meters. Is their a better datum to use or something else I can do to correct it?

olhe

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Post  orux on Tue Jan 04, 2011 7:15 pm

olhe wrote:My Swedish maps has this line in Ozi calibration map file:

RT90,WGS 84, 0.0000, 0.0000,WGS 84

Orux cannot use RT90 so I used WGS 84 and UTM instead but I get a W/E fault of about 150 meters. Is their a better datum to use or something else I can do to correct it?

Hi, olhe;

RT90 is an option in OruxMapsDesktop datums.

you have to calibrate your maps using this datum.

check if you are using last OruxMapsDesktop version.

orux

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Post  steggen on Thu Jul 07, 2011 2:54 am

I have converted old OZI-projects with OruxMapsDesktop and got perfect results, but new scanned maps are missing more than a thousand meters. I've tried ordinarie topgraphic maps with RT90 and also screenshots from Kartex and/or Fugawi with original files based on topgraphic maps (Blå kartan).

The imagefiles are saved in jpg and/or png. I've tried all possibilites with RT90 -> lat/long-> geographical, RT90 -> UTM (34) -> grid and many other combinations all with missing calibration results. I've calibrated in all 4 corners with correct pixels and correct coordinates from maps or from Kartex/Fugawi screenshots.

What am I doing wrong? Perhaps I have to go the way via OZI? My old fine working OZI-files with map/jpg are more than 10 years old but worked perfect with OMD.

Anyhow, thanks for great job, the Oruxapp and OMD.

steggen

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Post  orux on Thu Jul 07, 2011 2:20 pm

steggen wrote:I have converted old OZI-projects with OruxMapsDesktop and got perfect results, but new scanned maps are missing more than a thousand meters. I've tried ordinarie topgraphic maps with RT90 and also screenshots from Kartex and/or Fugawi with original files based on topgraphic maps (Blå kartan).

The imagefiles are saved in jpg and/or png. I've tried all possibilites with RT90 -> lat/long-> geographical, RT90 -> UTM (34) -> grid and many other combinations all with missing calibration results. I've calibrated in all 4 corners with correct pixels and correct coordinates from maps or from Kartex/Fugawi screenshots.

What am I doing wrong? Perhaps I have to go the way via OZI? My old fine working OZI-files with map/jpg are more than 10 years old but worked perfect with OMD.

Anyhow, thanks for great job, the Oruxapp and OMD.

Hi,

Send me one of those maps (the image) --> oruxuro@gmail.com

If they are too large, upload it to sharefile or similar,

orux

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