I have 31 points in a shapefile, which delimit a field (it's an irregular shape). I want to connect those points so they create the boundary of a polygon. Does anybody know a kind of "connect the dots" tool?
[GIS] how to connect points to create a polygon boundary in QGIS
geometry-conversionpolygon-creationqgis
Related Solutions
What if you buffer the first attempt by -35 meters. Should bring it back in line to before buffering.
Not perfect, but a working approximation.
Let's assume there is a point layer called "end" with it's attribute table, see image below.
Points are cotegorized by "class" (in your case they are grouped by the unique "ID" field) and spatially distributed (clustered).
I can suggest using the "Minimum bounding geometry" with 'convex hull' as an enclosing geometry type and grouped by a field.
Creates geometries which enclose the features from an input layer. The features can be grouped by a field. The output layer will then contain one feature per group value with a geometry (MBB) that covers the geometries of the features with matching value.
The result of this algorithm will look like
The same result can be achieved by means of "Concave hull (k-nearest neighbor)"
Generates a concave hull polygon from a set of points. If the input layer is a line or polygon layer, it will use the vertices.
Why not "Concave hull (alpha shapes)" or "Convex hull" algorithm, because they simply do not have a grouping field.
References:
Best Answer
The plugin you are looking for is called Points2One. (You might have to allow experimental plugins to install it.)