To get the distance of each polygon centroid from a line, I have tried the
Distance to nearest hub algorithm from the
Processing Toolbox. The distances I got from the algorithm did not seem correct, upon checking manually. I later tried the
v.distance GRASS command from within the Toolbox with the following settings:
It could be that I am not specifying the options correctly - for example, my "To" layer is a line and I have set the "Column where values specified by ' upload'..." to the "Descriptio" field. If this means that the calculated distances will be uploaded into the field then it could be the source of the issue. However, there is no option to create a new field to hold the distances (besides, a new layer is anyways created so I dont quite understand this setting). Nevertheless, running this command gives an error and QGIS stops working:
I dont know what the error is referring to. Is there some other plugin/algorithm that I can use? Alternatively, what are the correct settings for
Distance to nearest hub and
v.distance? I would like to achieve this entirely within QGIS, but am open to using R as well.
PS: I am running the latest version of QGIS (2.4 Chugiak) on Win 7 x64. I have already referred to the following questions on GIS SE:
UPDATE: I could not get this to work from within QGIS despite trying several permutations of the GRASS
v.distance settings. I finally used the
gDistance function from the
rgeos R package to obtain the result. However, while I have solved my problem for now, I would still like to know if one can do this is QGIS.