Re: [Qgis-user] GRASS map calculator bug/feature
Hi, nice to see that the tool is used. I found that you can type anything as constant (Add constant value) but that is just another bug because there should be QDoubleValidator set on that input so I cannot reccomend to use this because that may not work in future (including saved formulas). I would like to avoid the possibility to type anything in map input control because it is not robust enough - user can type wrong map name and r.mapcalc fails. GRASS Tools should not let a user to run a module with parameters which can fail. IMO we can add onother control beside map combo box for cell selection (default 0,0). If you are interested in this feature, please fill a new ticket (enhancement, 0.9). BTW, do you realy need to work with individual cells or do you need just a sum/avg/... from cells in neighbourhood? Radim On 12/26/06, Lubos Balazovic [EMAIL PROTECTED] wrote: Hi, in QGIS Preview2 (WINDOWS) there was a bug [1] in GRASS map calculator which preserves user to choose layer from list so user had to type name of the layer manually. Recently I've find out that this is nice feature which allows to type for example layername[10,10] which is interpreted by mapcalc as reference for neighbourhood of each processed cell in raster. Now the bug is fixed and nice feature is over. The question is: Is there currently another way in GRASS raster map calculator which allows to use referencies for cells neighbourhood? Is it possible to change static list of GRASS raster layers to be writeable? Lubos [1] http://svn.qgis.org/trac/ticket/318 ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] Error starting Qgis 0.8 ( libqgis_raster.so.0 )
Hi Does the file mentioned exist? Is it in your ldpath? Try running ldconfig as root. Regards Tim On 1/1/07, Luca Casagrande [EMAIL PROTECTED] wrote: Hi to all! I have built qgis with those configure options: qgis 0.8.0 -- GDAL/OGR : yes (Version 1.3.2) GEOS : yes (Version 2.2.3) PostgreSQL: yes (Version 8.1.5) GRASS : yes SPIT : yes Georeferencer : yes WFS : no GPS/GPX : no PROJ4 : yes SQLITE3 : yes Python: yes CPPFLAGS : -I/usr/include -I/usr/include CXXFLAGS : -O2 -march=pentium-m -pipe -fomit-frame-pointer Debug : no Plugin dir: /usr/lib/qgis When starting it i have got this error: qgis: error while loading shared libraries: libqgis_raster.so.0: cannot open shared object file: No such file or directory Is this a Gdal issue? Thanks Luca -- Help QGIS development! Make a donation right now at http://xrl.us/supportqgis LINUX User #411601 GENTOO-GIS Development Team jabber: [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- -- Tim Sutton Visit http://qgis.org for a great Open Source GIS Home Page: http://linfiniti.com Skype: timlinux MSN: [EMAIL PROTECTED] Yahoo: [EMAIL PROTECTED] Jabber: timlinux Irc: timlinux on #qgis at freenode.net ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] compare GIS
Hi Willem QGIS can do all these things as Martin has explained above. You can also see the qgis blog where I have posted various short tutorials on embedding QGIS canvas controls into your vertical application. One more thing that you should keep in mind when doing your evaluations is that QGIS is released under the GPL and uses the GPL version of Qt4 so you would be expected to to develop your software under the same license. Regards Tim On 12/29/06, Martin Dobias [EMAIL PROTECTED] wrote: On 12/29/06, Willem Jenniskens [EMAIL PROTECTED] wrote: Hello, The company I work for wants to develop certain GIS functionality on top of an existing GIS product. I would like to do a small comparison between the various GIS programs so that we can make a motivated decision. The application must enable us to develop the following: Hi Willem, when developping applications with QGIS, there are basically two options: - create a plugin for QGIS - create an application based on QGIS libraries - you can start a new application and use only some functionality from QGIS - e.g. postgis data provider, map renderer or map canvas etc. Applications have to be written with C++ and Qt as QGIS is based on them. In 0.9 release you will have also possibility to use Python instead of C++. - create functionality where a user can place symbols, lines or polygons in the map by drawing in the map. Next, a dialogbox must appear where he can enter some attribute information. The coordinates and the entered attribute data must be stored in a spatial database (postgis). Yes, you can use map canvas API for this or just directly use digitizing functionality of QGIS. Postgis backend is well supported. - One can have multiple views (windows) that are linked together; so when you pan in one view, the other views will pan along automatically. (there are different layers in each view) This could be done in case you would develop a new application - there you could create multiple map canvases and connect them together. - Create short-cut keys for various functions; for example to make layers visible / invisible and to zoom in to a certain scale. Should be easy - actions in Qt allow settings shortcuts. - It must be fast with raster and vector data Well, this is for your own consideration whether it's fast enough. - Make use of global variables that we can use in the entire application Why not... - Create buttons, menu bars, etc that execute our developed scripts A piece of cake :) Check out developer's corner on QGIS wiki, you'll find some tutorials on how to develop plugins and/or custom applcations with QGIS: http://wiki.qgis.org/qgiswiki/DevelopersCorner Regards, Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- -- Tim Sutton Visit http://qgis.org for a great Open Source GIS Home Page: http://linfiniti.com Skype: timlinux MSN: [EMAIL PROTECTED] Yahoo: [EMAIL PROTECTED] Jabber: timlinux Irc: timlinux on #qgis at freenode.net ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
