[Qgis-user] Field Calculator/Python Plugins
Hi, 1. Where can I learn more about on how to use the Field calculator as well as the Python Plugins as Iam new to this. 2. I need to determine the unemployment rate for each district. There are over 10 000 small_place_codes and just over 1000 district. The majority of the small places overlaps with districts so I did an intersection for the two layers. An example of the results are as follows: 3. How can I now calculate what the average percentage are per Small_Place_Code and also what the results will be for each district? Small_Place_Code Districk_Name Small_Place_Areakm2 District_AreaKM2 Unemployment_Rate% 1112 Hamilton 0.0254 2.1753 6.21 1113 Hamilton 0.1254 2.1753 4.25 1114 Hamilton 2.0245 2.1753 21.21 1112 Queens 0.0045 4.4316 6.21 1114 Queens 0.215 4.4316 21.21 Queens 0.2121 4.4316 4.35 Queens 4.000 4.4316 5.69 Regards Deon ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Copy Selected Attribute Table Columns
Hi, How can I copy only selected attributes column is the attribute table without have to copy the WKT_Geometry column which is not visible in the attribute table but visible in the excel spread sheet when pasted because it takes a lot of space in my excel spread sheet. Regards Deon ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] FW: Using one vector layers to calculate the unemplyment rate in another vector layer
Hi Everybody, I have a vector layer that exist out of about 1000 polygons of the different police districts. Then I have a Sensus sub-place vector layer with over 10 000 sub-places which indicate the number of unemployed citizens per polygon. The Sensus sub-place layer therefor overlaps with the police districts and when visualize some sub-places can make up 1% up to 100% of a given police district. Most of the police districts also contains 4 or more sub-places. The problem is I want to calculate the approximate unemployment rate per police district by using the data from the Sensus sub-place layer. Is there perhaps an explanation on how I can determine approximately proportionally what the unemployment is per police district. I am new to QGIS and not up to date with programming, however any assistance would be appreciated. Regards Deon Pretorius ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Topological editing of two vector layers
Hi, Iam new to QGIS. I have two boundary vector layers, the one exist of polygons of all the provinces and the other of all the districts. The district boundaries must be aligned with the provincial boundaries. Since there is so much errors that needs alignment and rectification I was wondering if there isn't an easier way as to snap to the boundaries without to drag each vertex which is very time consuming. Is there perhaps a way where the whole identified segments/vertex of the districts can be aligned easier to the provincial boundaries. Regards Deon Pretorius ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
