[Qgis-user] Field Calculator/Python Plugins

[Pretorius Deon - Lieutenant Colonel]

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

3333

Queens

0.2121

4.4316

4.35

3333

Queens

4.000

4.4316

5.69


Regards
Deon



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