New answers tagged spatial-database
Some kinds of transformations are lossy. Transverse mercator for example can only be used for the visible half of the globe. The back side gets lost when you try to re-transform. Mercator only looses the poles, because it is accepted that the cylinder is unrolled in a world map. This is important if you have huge shapefiles, e.g. complete Russia or the ...
projections of vector datasets are not lossy in theory (if you don't have rounding errors, of course, which will depend on your software and your data storage precision). You should however be careful with projection of raster datasets, which are lossy because of the resampling. Now, if you change the datum (from one geographic coordinate system to ...
If you don't have much experience with PyQt, I would suggest that you use the QGIS Plugin Builder plugin to get you started. This will generate a basic plugin structure including UI which you can then modify using Qt Designer to suit your purpose. You would need to write a bit of Python to carry out the 'search for a point on the map using data that the user ...
Have a look at the "Quick Finder" plugin available on the official QGIS plugin repository (Plugins > Manage and install plugins...). It sounds like this will do what you need.
I solved this a week ago. The problem was that I had ACAD Map3D for 64bit and my mysql version was 32 bit so libmysql.dll was 32 bit too.
PostGIS/Postgres and the Quantum GIS plugin DB Manager allows you to display raster images easily.
I do not have to register the mysql dll. Instead, I just copy it into the bin/fdo dir. I do not even have to reboot. I run a lab full of PCs and all I have to do is copy the dll into the folder and off we go.
Note that I am attempting this answer with little experience in table inheritance. Practically everything I know about it can be found in the PostGis Cookbook and in the PostgreSQL docs. Consider the following tables: CREATE TABLE features ( gid SERIAL PRIMARY KEY, the_class varchar(20), the_type varchar(30), status varchar(50) ); CREATE TABLE ...
The arcpy.da.Walk() method is the way to go: import arcpy, os workspace = r"C:\Users\OWNER\Documents\ArcGIS\Default.gdb" feature_classes =  for dirpath, dirnames, filenames in arcpy.da.Walk(workspace, datatype="FeatureClass", type="Any"): for filename ...
You can run this code to get it: arcpy.env.workspace = NAME OF GDB HERE # Get stand alone FCs fccount = len(arcpy.ListFeatureClasses("","")) # Get list of Feature Datasets and loop through them fds = arcpy.ListDatasets("","") for fd in fds: oldws = arcpy.env.workspace arcpy.env.workspace = oldws + "\\" + fd fccount = fccount + ...
Thanks Mapperz, the link helped to get a feeling about the status of the spatial plugin. http://www.mysqlperformanceblog.com/2013/10/21/using-the-new-spatial-functions-in-mysql-5-6-for-geo-enabled-applications/
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