An odd coordinate reference system – Pulkovo 1942(58) (GDAL compatible)

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Author Name: zirneklitis - (zirneklitis -)
Original Redmine Issue: 4652

Redmine category:projection_support

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This coordinate system is total crap. The data projected in this CRS cannot be re-projected to other systems. “Pulkovo 1942(58) (GDAL compatible)” as the project's CRT creates a mess. Some screen shots will be added to illustrate my opinion. Four different grids are mapped. Note the travel of the red lines representing the “Pulkovo 1942(58) (GDAL compatible)” grid.

Tested with 1.7.1. The same problem with 1.9.90-Alpha QGIS code revision f61988e

The CRS “EPSG:44179 Pulkovo 1942(58) (GDAL compatible)” should be removed from the list.

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• Project-s_CRS-EPSG4179.png (zirneklitis -)
• Project-s_CRS-EPSG4284.png (zirneklitis -)
• Project-s_CRS-EPSG4326.png (zirneklitis -)
• Project-s_CRS-EPSG44179.png (zirneklitis -)
• Project-s_CRS-EPSG3059.png (zirneklitis -)
• Project-s_CRS-EPSG3059_1.9.9.png (zirneklitis -)
• example.7z (zirneklitis -)

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Author Name: zirneklitis - (zirneklitis -)

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• 4125 was configured as Project-s_CRS-EPSG4284.png

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• Project-s_CRS-EPSG4284.png (zirneklitis -) - Project CRS: EPSG 4284

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Author Name: zirneklitis - (zirneklitis -)

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• 4126 was configured as Project-s_CRS-EPSG4326.png

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• Project-s_CRS-EPSG4326.png (zirneklitis -) - Project CRS: EPSG 4326

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Author Name: zirneklitis - (zirneklitis -)

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• 4127 was configured as Project-s_CRS-EPSG44179.png

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• Project-s_CRS-EPSG44179.png (zirneklitis -) - Project CRS: EPSG 44179

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Author Name: zirneklitis - (zirneklitis -)

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• 4128 was configured as Project-s_CRS-EPSG3059.png

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• Project-s_CRS-EPSG3059.png (zirneklitis -) - Project CRS: EPSG 3059 (QGIS 1.7.1)

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Author Name: zirneklitis - (zirneklitis -)

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• 4129 was configured as Project-s_CRS-EPSG3059_1.9.9.png

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• Project-s_CRS-EPSG3059_1.9.9.png (zirneklitis -) - Project CRS: EPSG 3059 (QGIS 1.9.9)

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Author Name: zirneklitis - (zirneklitis -)

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• 4130 was configured as example.7z

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• example.7z (zirneklitis -) - The original shape files and QGIS project file

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Author Name: Jürgen Fischer (@jef-n)

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QGIS syncs it's CRS with GDAL. So this should probably be taken there. But you also might want to check if the CRS is in the latest version of GDAL too.

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• priority_id was changed from 6 to Low
• resolution was changed from to wontfix
• status_id was changed from Open to Rejected

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Author Name: zirneklitis - (zirneklitis -)

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If it's so why this CRS is listed nowhere else except in QGIS? E.g. GRASS on the same system (= using the same GDAL?) does not provide such CRS.

This CRS is mentioned only in QGIS resources:
/usr/share/qgis/resources/srs.db
C:\OSGeo4W\apps\qgis
esources\srs.db
C:\OSGeo4W\apps\qgis-dev
esources\srs.db

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Author Name: Jürgen Fischer (@jef-n)

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zirneklitis - wrote:

If it's so why this CRS is listed nowhere else except in QGIS? E.g. GRASS on the same system (= using the same GDAL?) does not provide such CRS.

Right. The CRS are only updated, but not removed.

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• status_id was changed from Rejected to In Progress
• resolution was changed from wontfix to

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Author Name: Jürgen Fischer (@jef-n)

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Applied in changeset "42e02d82c05b4da370be77ef71345ba62457cc66".

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• status_id was changed from In Progress to Closed
• done_ratio was changed from 0 to 100

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Author Name: Borys Jurgiel (@borysiasty)

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Well, in Qgis <1.7 it wasn't any "total crap" ;p It was painful but essential workaround to allow Qgis to recognize proj strings without +towgs parameter (coming from older GDAL versions, ArcGIS etc).
In Qgis 1.7 it became unnecessary and, in the same time, incompatible, so please backport it to 1.7

But first please restore 900913 for one important reason: If a WMS supports EPSG:900913 and not EPSG:3785, then it's unavailable for Qgis now. Also OpenLayersPlugin use it (what is smaller problem, as it can be updated to 3785). Finally, I believe 900913 is better recognizable than 3785.

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Author Name: Giovanni Manghi (@gioman)

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Jürgen Fischer wrote:

Applied in changeset "42e02d82c05b4da370be77ef71345ba62457cc66".

Hi Jurgen,

in QGIS master I don't see anymore CRSs like the Google Mercator, maybe a side effect of this fix?