GIS spatial join ambiguity calculator

Calculate point zone matches and assignment with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use point zone matches and assignment to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Point coordinates [x,y]
[[1,1],[3,1],[7,1]]
JSON array of zone exterior rings
[[[0,0],[4,0],[4,4],[0,4]],[[2,0],[6,0],[6,4],[2,4]]]
Tie policy: 0 unresolved; 1 first zone
0
Point zone matches and assignment
[[0,[0],0],[1,[0,1],"Unresolved"],[2,[],"Outside"]]

Try another scenario

Point coordinates [x,y]
[[1,1],[3,1],[7,1]]
JSON array of zone exterior rings
[[[0,0],[4,0],[4,4],[0,4]],[[2,0],[6,0],[6,4],[2,4]]]
Tie policy: 0 unresolved; 1 first zone
1
Point zone matches and assignment
[[0,[0],0],[1,[0,1],0],[2,[],"Outside"]]
Calculation method

Calculation method

Point zone matches and assignment

All inside-or-boundary matches; overlaps either unresolved or lowest input zone index.

Symbols and units
a
Point coordinates [x,y]
b
JSON array of zone exterior rings
c
Tie policy: 0 unresolved; 1 first zone

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Points, overlapping zones, tie rules. Returns Multiple matches and unresolved assignments. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Tie policy: 0 unresolved; 1 first zone: minimum 0, maximum 1.
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