GIS coordinate reference compatibility calculator

Calculate layer compatibility requirements with your own figures.

Your numbers

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

Use layer compatibility requirements to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Layer rows [name,CRS identifier,west,south,east,north]
[["roads","EPSG:4326",-10,40,10,60],["parcels","EPSG:3857",-5,45,5,55]]
Target CRS identifier
EPSG:4326
Target area of use [west,south,east,north]
-180,-90,180,90
Layer compatibility requirements
[["roads","CRS identifier matches","Inside supplied area of use"],["parcels","Transformation required","Inside supplied area of use"]]

Try another scenario

Layer rows [name,CRS identifier,west,south,east,north]
[["roads","EPSG:4326",-10,40,10,60],["parcels","EPSG:3857",-5,45,5,55]]
Target CRS identifier
EPSG:3857
Target area of use [west,south,east,north]
[-180, -90, 180, 90]
Layer compatibility requirements
[["roads","Transformation required","Inside supplied area of use"],["parcels","CRS identifier matches","Inside supplied area of use"]]
Calculation method

Calculation method

Layer compatibility requirements

Compare exact supplied CRS IDs; flag transform requirement and supplied geographic area-of-use containment. Does not perform transformations.

Symbols and units
a
Layer rows [name,CRS identifier,west,south,east,north]
b
Target CRS identifier
c
Target area of use [west,south,east,north]

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

  • Metadata compatibility audit only. Layer extents must be supplied in geographic longitude/latitude regardless of native CRS; exact identifier match does not prove matching datum epoch or axis order. 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. Target area of use [west,south,east,north]: minimum None, maximum 1000000000000.0.
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