[Qgis-user] Count points overlaying a raster layer

[Randal Hale]

I would convert your raster to vector.

Assuming you are on 2.18 (which is what I am currently using) - open 
your processing toolbox. At the top of QGIS click on Processing -> Toolbox.

1. In your toolbox go to GDAL/OGR -> Conversion -> Polygonize raster to 
Vector. Once you change that to a vector file then go to the next step.

2. In your toolbox go to QGIS geoalgorithms -> Vector Analysis Tools -> 
Count points in polygons. That should add a field to your new polygon 
shapefile with the number of points in that polygon.

Good Luck.


On 11/28/2016 09:37 PM, K Imran M wrote:
> Dear all,
>
> I apologize if this has been asnwered before. My question is:
>
> if I have 2 layers- one is a vector (points in shapefile format) layer 
> and the other one is a raster layer (flood area). And I would like to 
> count the number of points inside the flood area. How can I do that? 
> Should I convert the raster to vector first? Can anyone kindly refer 
> me to any resource if you know any?
>
> Best regards.
>
> Kamarul
>
> ---------------------------------------------------------------------
>
> Kamarul Imran Musa (MD MCommunityMed)
> Associate Professor (Epidemiology and Biostatistics) &
> Public Health Physician,
>
>
>
>
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-- 
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Randal Hale
North River Geographic Systems, Inc
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