Grid Generator
Generate a rectangular grid (in a real projected CRS) or an H3 hexagonal grid, and aggregate a point layer's counts and numeric fields into each cell.
How to use
- Pick or paste a Point layer — its extent (bounding box) is used to place the grid.
- Choose Rectangular (pick a projected CRS whose area of use covers your data, and a cell size in meters) or H3 (pick a resolution 0–15) — check the estimated cell count before generating.
- Pick which numeric point fields to sum/average per cell, then generate — the result includes a point count and those stats per cell, downloadable or addable to the workspace.
- A rectangular grid is built in the projected CRS you pick, not by adding a fixed degree step — using a CRS meant for a different region will still produce a grid, just not accurately square-meter cells.
- H3's containment rule is cell-center-inside — a cell that only overlaps the edge of your area without its center inside it is not included.
- Generation refuses (with a clear message) rather than freezing the tab when the estimated cell count is too high — increase the cell size or use a coarser H3 resolution.
The rectangular grid is built in a real projected CRS you choose (never by adding a fixed lon/lat step, which produces non-square cells away from the equator) — pick one whose area of use covers your data. The H3 grid includes a cell only when its CENTER falls inside the area (not every intersecting cell). Only rectangular and H3 grids are implemented — S2 polygon fill is not.
Pick or paste a points layer to generate a grid around it.
Grid Generator Coverage
Generates a rectangular grid or an H3 hexagonal grid. The rectangular grid is built in a real projected CRS you choose, not by adding a fixed lon/lat step — so cells stay square regardless of latitude. Grid cells are aggregated against a point layer using the same point-in-polygon engine as Spatial Join (count plus numeric field stats per cell).
H3's containment rule — a cell is included only when its center falls inside the target area, not every cell merely overlapping the boundary — is stated explicitly. S2 polygon fill isn't implemented (only S2's separate point-to-cell conversion exists); an over-the-limit estimated cell count is refused with a clear message instead of generating.
Frequently asked questions
Is the rectangular grid exactly square?
Yes, within the projected CRS you picked. The result is reprojected to WGS84 for map display, so it may not look like a perfect square in lon/lat terms — that's an expected side effect of reprojection, not a bug.
Does the H3 grid include every cell touching the boundary?
No — only cells whose center falls inside the specified area. A cell that overlaps the edge without its center inside is excluded, and this rule is stated on the page rather than left implicit.