[Qgis-user] Problem with Rasterize (Vector to raster) tool

[Saber Razmjooei]

In QGIS, ensure Processing plugin is enabled.

>From Processing interface, change the interface to Advanced (bottom of the toolbar)

Within the module search, type v.to.rast

>From the module list, select v.to.rast.attribute

Fill in appropriate boxes and hit Run.

 

Cheers,

Saber

 

Saber Razmjooei
Lutra Consulting
 <http://www.lutraconsulting.co.uk/> www.lutraconsulting.co.uk




 

 

 

 

From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Colin D. MacLeod
Sent: 10 April 2014 14:20
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Problem with Rasterize (Vector to raster) tool

 

Hi All,

 

I’m a fairly experienced GIS user, but I’m new to QGIS. I’m using version 2.2, and I’m trying to convert a point data layer into a raster data layer using the Rasterize tool. The point data layer has an integer field with a value of 1 for all records, and I want to make a raster data layer which has a value of one for each cell which has at least one point in it (some cells have more than one point in them). When I use the Rasterize tool, it creates the raster data layer fine, but all cells with have points in them appear to have a value of 0.995968. I’ve tried editing the gdal code (even making the resulting raster data layer an integer layer), but I still cannot get it to produce a raster with a value of 1 rather than just a number very close to one. 

 

Does anyone have any suggestions of where I might be going wrong and/or how to solve this issue?

 

On a related note, is it possible to use the Rasterize tool to work out the average or total values for all the points which fall in each grid cell? If so, how (I can’t find anything in the gdal instructions themselves which would suggest this is possible, but I might be missing something). If this isn’t possible to do with the Rasterize tool, are there other tools in QGIS which can do this?

 

Thanks for any help anyone can give on this.

 

All the best,

 

Colin

 

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