Is it possible to convert Points into Polygons in QGIS 2.10 Pisa? I just want to create a 1x1m Polygon based on the centroid of each Point.
I tried Vector > Geometry Tools > Voronoi Polygons but that is not what I want at all.
[GIS] Convert Points to Polygons in QGIS
convertqgis-2
Related Solutions
I would suggest to build a csv file with WKT representation of the polygons you want out of your excel data using some text functions.
The basic syntax is:
ID;WKT
1;POLYGON((-74.25 41.75, -74.0 41.75, -74.0 41.5, -74.25 41.5, -74.25 41.75))
It is important that the first polygon point must be repeated as the last, all points enclosed by double paranthesis, coordinates seperated by blanks, points seperated by commas, and therefore semicolon as delimiter.
Importing as Delimited text file you get one shapefile for all polygons, which can be dissolved in a second step.
The "Polygonize" tool from the Processing toolbox still works fine for me on simple lines:
It is however necessary that the lines intersect, or share common vertices. And lines should have no self-intersection.
You might need to snap the corner vertices to get it working. I usually set the snapping tolerance to 10 pixels to the vertex.
Best Answer
By the sounds of it, you want to buffer your points (go Vector->GeoProcessing Tools->Buffer(s)). Push the 'segments to approximate' up to get a smoother circle.
If you want square buffers, unfortunately the plugin that did that has not been updated to work with QGIS 2.x. However a work around could be to rasterize your points with a resolution of 1m and then convert the raster to a vector. The alignment of some of your resultant polygons may be a bit off though as a raster is a regular grid and I assume your points are not aligned to a grid.
If you want a grid do a search as there are a few posts on that subject (hint - look in Vector->Research tools)