In geometry, the centroid, geometric center, or barycenter of a plane figure or two-dimensional shape X is the intersection of all straight lines that divide X into two parts of equal moment about the line. Informally, it is the "average" (arithmetic mean) of all points of X. The definition extends ...
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How to create point labels from midpoints of road polylines in QGIS?
Heres what i want to achieve: i have a roading polyline layer (singlepart ie has several features per road, grouped by an id field), and i want to (after merging the parts) find the mid point of the ...
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Centroid of the equator and a point
Suppose I already have a way to compute the centroids of different geometry types:
Points (arithmetic mean of Cartesian coordinates).
Linestrings (polylines) (weighted mean of segment mid-points in ...
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OpenLayers move each vector feature of layer by constant pixels away from center
I am stuffing a lot of features, each from a different layer, onto exactly the same point, so the visual result is somewhat confusing and it is necessary that some graphics have some offset of ...
