Re: [Qgis-user] Counting instances of points and representing totals

2015-09-29 Thread Christine
Good morning, what about creating a buffer with a distance of your choice and counting the points inside the buffer (count points inside polygon)? If you dissolve the buffers, you should get the sum of accidents in a range defined by you buffer distance. That could help in case your accident point

Re: [Qgis-user] Counting instances of points and representing totals

2015-09-29 Thread Randal Hale
If every Accident has an ID for location you can use the group stats plugin to summarize the # of wrecks in each location. You could then save that out to a text file and join it to a point layer and get the graduated symbol you are after. If not - I'm thinking you set a very small buffer in e

Re: [Qgis-user] Counting instances of points and representing totals

2015-09-29 Thread Nicolas Cadieux
Hi, The easy way out is to do a cross tabulation in excel or libre office calc and to then link both data bases together based on the point id.  I think there may also be a cross tabulation plugin in QGIS???  I would need to look on a computer to make sure. Nicolas Cadieux M.Sc. Les Entrepris

[Qgis-user] Counting instances of points and representing totals

2015-09-29 Thread Johanna Botman
Hi, I'm having trouble working out what should be a simple problem. I have data that lists all the traffic accidents in our local area. Each accident has a unique ID, but there can be many accidents at the one location. I want to show the accumulated accident numbers using a graduated symbol s