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5 changes: 4 additions & 1 deletion Geospatial.md
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,9 @@ may also be used if the WKB representation remains wire-compatible.
Coordinate Reference System (CRS) is a mapping of how coordinates refer to
locations on Earth.

For `geometry` type, the CRS does not affect geometric calculations, which
are always Cartesian.

The default CRS `OGC:CRS84` means that the geospatial features must be stored
in the order of longitude/latitude based on the WGS84 datum.

Expand Down Expand Up @@ -100,7 +103,7 @@ only null or NaN values, that dimension is omitted from the bounding box. If
either the X or Y dimension is missing, then the bounding box itself is not
produced.

For the X values only, xmin may be greater than xmax. In this case, an object
For `geography` type only, xmin may be greater than xmax. In this case, an object
in this bounding box may match if it contains an X such that `x >= xmin` OR
`x <= xmax`. This wraparound occurs only when the corresponding bounding box
crosses the antimeridian line. In geographic terminology, the concepts of `xmin`,
Expand Down