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Very poor datum support

Ricardo M. shared this question 5 years ago
Answered

How can I use a map with European Datum 1950?

Is very usual datum in Europe and many apps support it but not this one....

I guess many people in Europe would buy the application if it improved support for a variety of datums. It's a real issue.

Replies (6)

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http://docs.locusmap.eu/doku.php?id=manual:user_guide:maps_external


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Remains unanswered.

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Hello Ricardo

I assumed that you have this map.

I wrote a link to use it.

If you do not have it you have to search (google)


Another option is to use the WMS layer (1950)

Also, look for WMS (google)


http://docs.locusmap.eu/doku.php?id=manual:user_guide:maps_wms

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Thank you very much. This exceeds my current knowledge about coordinate systems.

I just know that i have found another application which make it easier for us with old raster european maps. But this application has other advantages. Continue to improve it, please. Thank you!

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Dear Ricardo,

there are two aspects: the coordinate system of source map and the format of raster map. The most used (in Locus) raster formats *.mbtiles and *.sqlitedb use the srs EPSG:3857. But for example *.TAR format supports any coordinate system and Locus should import it. I expect that your source map is in geotiff format and it's needed to convert it. I would suggest to use mbtiles or sqlitedb format:

- there is plugin for QGIS that it's able to convert raster format to mbtiles http://discuss.locusgis.com/t/how-to-import-geotiff/26 (tutorial is for Locus GIS app but will work also for Locus Map)

- you can use mapc2mapc SW to convert your map into sqlitedb format

http://www.the-thorns.org.uk/mapping/help/locus.html

http://docs.locusmap.eu/doku.php?id=manual:advanced:map_tools:conversion


BTW: if you want to use also coordinates with any coordinate system, please see: http://docs.locusmap.eu/doku.php?id=manual:advanced:customization:coord


Best regards

Petr

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Thank you very much, Petr!. Great help!. I have to study all this and update my maps.

Thanks!

EDIT:

I have some ED50 .rmap files from Europe. So..., is posible to convert .rmap files to a format Locus is able to open with right coordinates? Or perhaps is easier to search for another updated maps... in mbtiles format

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Locus has limited support of *.rmap format - but it's really limited. I think that mapc2mapc is probably able to convert rmap format into sqlitedb. Unfortunately the webpage of Mapc2mapc SW is down, but please check (later) the supported formats on http://www.the-thorns.org.uk/mapping/help/formats.html

BR Petr

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