4,250 reputation
1122
bio website barry.rowlingson.com
location Lancaster, United Kingdom
age 49
visits member for 4 years, 7 months
seen 12 hours ago

Here I am.


Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
So I think I've nailed the method, it something in your data or your setup. Can you make the data available?
Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
Is your postcodes layer a point shapefile? Or is it a CSV you've loaded without geometry? Can you map it? Something's not right.
Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
No, you get one point for every line in your CSV, (minus the ones that don't match).
Apr
17
answered How can I geocode CSV by postcode, using existing point data, in QGIS?
Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
What do you want to do if one of your data points has a postcode that isn't in the postcode-coord lookup?
Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
Righto, I think we need some sample dummy data sets for playing with... (oh, and its easy to do in R).
Apr
17
comment How can I geocode CSV by postcode, using existing point data, in QGIS?
Where is your postcode-coordinate information stored? In a shapefile or similar with postcode as an attribute? Is that what you mean by "the postcode layer"?
Apr
5
comment Which UTM zone to use for a large country?
If you have a large area and you want distance measurements accurate to a high precision then you should stick to WGS84 Lat-Long and compute the distances via great-circles on the WGS84 ellipsoid. What are you doing with the distances once you have them?
Apr
5
answered plot 3D graph based on raster pixel values
Mar
26
comment Count roads crossing borders
What data have you got? Or do you need us to help you get that too? What software have you got?
Mar
21
answered Overlaying lines and aggregating their values for overlapping segments
Mar
20
comment Overlaying lines and aggregating their values for overlapping segments
So your output is a set of simple linear features corresponding to the sections of road in that network with an attribute that is the total for all the input simple linear features that go over it? I think rgeos::gOverlaps and gIntersection will be the key here...
Mar
20
comment Overlaying lines and aggregating their values for overlapping segments
geojsonio is non-CRAN, yes? This: devtools::install_github("ropensci/geojsonio")
Mar
18
comment Can I use custom icon in QGIS?
how are you loading that into Qgis? My version 2.8 only loads .dxf autocad files...
Mar
13
comment Can I use custom icon in QGIS?
@YuAlex no, please make a file public on dropbox, or upload to github, or some other site. Make it as small as possible that still demonstrates the problem. That will also remove any problems with sharing possibly secret data.
Mar
12
comment Trying to convert coordinates for use in ArcGIS
A small sample from your spreadsheet for us to download would help about 1000% here.
Mar
12
comment Can I use custom icon in QGIS?
Any chance you can supply a sample AutoCAD file that exhibits this?
Mar
12
revised Can I use custom icon in QGIS?
added qgis tag
Mar
10
answered Making centeroids for vector grid
Mar
10
comment Create diagonals in polygon with QGIS or ArcGIS
For a polygon with N points there's N*(N-3)/2 possible diagonals (lines between boundary vertices that aren't edges). Those could easily be all computed in Python in QGIS (or in R). What criteria do we use to select the ones you want? Length? Not crossing the polygon?