[Qgis-user] SRID and CS-63
Life doesn't get any easier - one answer brings up a bunch of questions :) At this moment I am certain that our whole country uses CS-63 for cadastral purposes. BTW, I've done some research and here's what I've found out. It seems that the soviets invented this system to supposedly make it harder for NATO to target their ballistic missiles at the soviet territory. Basically CS-63 is the same Krasovski ellipsoid, Pulkovo datum and Gauss-Krueger coordinate system only with a different nomenclature. The land is split in 1:100'000 zones but these zones have an irregular spape. Also, these zones intersect (SIC!). In our cadastral exchange file specs four zones are mentioned as valid - X, C, P, T. Also 10'000 maps use 3-degree zones instead of 6-degree, hence the coordinate center is shifted 250 Km west (as opposed to 500 Km). Axis meridian of every zone is shifted 30 minutes west. Finally, every zone has its own additional shift of both latitude and longitude several minutes and coodrinate center shift of about 10 Km. The magnitude of these shifts is classified info. It seems that conversion from CS-63 to CS-42 requires different coefficients for every zone. Similarly, I'd need a different SRID for every CS-63 zone. But is that really necessary for our cadastral purposes? I am pretty sure that we're going to have a separate project for every town surveyed. Does it really matter what kind of reference system we are using if the project will be isolated and never used with other projects, and its coordinates are consistent within the project? So if I make a PostGIS DB, I guess I can ignore the SRID (set it to -1)? Do you think it's OK to ignore the SRID? -- View this message in context: http://www.nabble.com/Quantum-GIS-and-cadastre-tp14477338p14771556.html Sent from the qgis-user mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Quantum GIS and cadastre
Sat 29 Dec 2007 16:52, Ziegler Stefan wrote: No arcs? Lucky you! I found this: http://www.urigal.net/medias/files/gis-tools.tar.gz These are some python scripts for doing some surveying calculation like lat/lon - UTM or polar-coords - cartesian-coords. i recently had a look at it, looks quite primitive but good. a similar inspiration is.. https://svn.osgeo.org/grass/grass/trunk/misc/m.cogo/ The guy's intention is to make a qgis plugin sometimes a qgis plugin would be nice indeed. s. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] SRID and CS-63
I see. I'm pretty sure I'll not be using GPS in the nearest future. Actually I'm beginning to understand why our country is still using the CS-63. All of our reference points are in CS-63. Can't understand why bloody KGB or whatever doesn't release specs for CS-63 zones. I'm so pissed... sebastian sauer-2 wrote: no, at the moment you don't need this. you will only need this if you also want e.g. coordinates from a GPS-device transformed to CS-63. -- View this message in context: http://www.nabble.com/Quantum-GIS-and-cadastre-tp14477338p14771795.html Sent from the qgis-user mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
[Qgis-user] Problem compiling PyQt4
I am trying to compile qgis 0.9.1 on my Fedora Core 6 system. (qgis 0.8.1 is already installed and working). Fedora 6 runs on Qt-3.3, but I've added Qt4 and Qt4-devel thru yum. I've downloaded and compiled SIP, but when I get to compiling PyQt4 here's the error: python configure.py -w -q /usr/lib/qt4/bin/qmake Determining the layout of your Qt installation... /usr/lib/qt4/bin/qmake -o qtdirs.mk qtdirs.pro No generator specified in config file: /home/micha/download/gis/PyQt-x11-gpl-4.3.3/qtdirs.pro Unable to generate makefile for: qtdirs.pro I decided to try running cmake anyway in the qgis source as follows: cmake -D GRASS_PREFIX:PATH=/usr/local/grass-6.2.2/ . and of course I got... -- PyQt4 not found! -- Python bindings disabled due dependency problems! -- Found Qt-Version 4.3.2 But all other pre-requisites were found. Next I did the make and make install for qgis, and the build completed successfully. The newly compiled qgis seems to be running fine. Plugins open as expected, etc. (except for the Print Composer ??) So my questions are: 1- What do I lose by not having Python bindings? 2- Any ideas how to overcome that error with PyQt4 TIA, Micha ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Problem compiling PyQt4
On Jan 12, 2008 2:36 PM, Micha Silver [EMAIL PROTECTED] wrote: 1- What do I lose by not having Python bindings? Python support in QGIS is optional, that's why it compiles and works also without it. The most interesting part of the python support for ordinary users is ability to use plugins written in Python. There are already some plugins available (see http://spatialserver.net:3001/ ) and more can be expected to come. Power users could use Python support in QGIS to do some scripts for handling their geographic data or even build graphical applications based on QGIS libraries. 2- Any ideas how to overcome that error with PyQt4 No idea here, you could get some advice on PyQt mailing list... Regards, Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
