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4

You can do both: At Using customized Coordinate System for Archaeological site data I have explained how to set up a local CRS based on the origin of the local system. The data in the local CRS remains untouched, and can still be edited. Or you can use the affine transformation plugin to shift the data into real world coordinates. This has the disadvantage ...


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If a coordinate reference system (CRS) identifies itself as an ellipsoid (spheroid in Esri-speak) and there's no datum information, there are no available transformations. Ellipsoids are used for multiple datums and geographic CRS. If you have the area of interest, you can find out what geographic CRS have been used in the area. If there are multiple ones, ...


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What is the epsg code of your data that ArcGIS recognizes? It should be 4024 for the Krasovsky ellipsoid without datum. Try to set it to the data if it is not recognized and have a look if ArcGIS has a transformation then. Otherwise it would be best to have a look for reference points when you are not sure about the correct positions. The ellipsoid, ...


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Both definitions have identical values. Just the names are different, and there is little you can do about it. You can run gdalsrsinfo on both files, and they return: PROJ.4 : '+proj=tmerc +lat_0=0 +lon_0=33 +k=0.99995 +x_0=200000 +y_0=-3500000 +ellps=WGS84 +units=m +no_defs ' This is the format that QGIS uses for the projection definition, without any ...


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The MGI 1901 projection is ok. The Austrian surveying authority changed their MGI datum in the 1920ies, but the Yougoslav surveying authority did not follow, Hence they still surveyed in MGI 1901. The difference is in the +towgs84 parameters: MGI 1901 / Balkans zone 6 +proj=tmerc +lat_0=0 +lon_0=18 +k=0.9999 +x_0=6500000 +y_0=0 +ellps=bessel +towgs84=682,-...



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