5.7 Density map - LUPMISManual

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5. Conversion of data

5.7 Density Map

Level of expertise required for this Chapter: Advanced; general Map Maker training


You have points and want to produce a density map. For example, you know all clinics and want to produce a map with the intensity of clinic pattern.

1. Create point DRA file

Most likely, you already have a point DRA file, or you convert a LOC file to a
DRA file.

2
. Create a DTM (TER file)

Utilities > 3D surface utilities > Create surface > Density surface from spot values



> Select DRA file of step 1 > Density surface window: Accept all as proposed > OK



> 'Save as' window to save as TER file > Enter new name > Save

3) Produce contour (DRA line) file (if required)

Utilities > 3D surface utilities > Export surface > As contours



> Step 1: 'Choose source TER file' and select from 2) above > Next step
> Step 2: Select highest possible (10) > The ..... should be somewhere between the min and the max z (in this example: Z is between 1 and 7: Good entry is 1)



> Step 3: 'Choose target file' > Enter new name for the new DRA line file > Finish > Confirm save



4) Produce contour (DRA line) file (if required)

Polygons are based on the DRA line file, created in the previous step:

Utilities > Vector utilities > Actions > Select DRA line file from previous operation > Polygon manipulation > Convert lines to polygons > OK >




Convert lines to polygons' window: Accept all as proposed > OK > 'Save as' window: Enter new name for this new DRA polygon file.

You might have to do some editing of the styles to get the right colors
.




5) Produce raster (JPG or similar) file as background (if required)

Utilities > 3D surface utilities > Create bitmap > Altitude > Select TER file created in step 2 > Open > Settings: Pixels per cell: 10 >
Colours > by Bands > Define your favourite. In most cases a dark-light pattern fits best, i.e at Top colour, define a dark gray, in Bottom colours, define a light gray:





OK > Ok > 'Save as' window to save as JPG (or BMP) file > Enter new name > Save > Map Maker calibration > OK




  


 
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