Changes between Version 22 and Version 23 of rfc61_support_for_measured_geometries

Timestamp:

Jan 29, 2016, 1:46:25 AM (8 years ago)

Author:

Ari Jolma

Comment:

--

rfc61_support_for_measured_geometries

@@ -90 +90 @@
 }}}
 
-Currently a hack to set nCoordDimension negative is used to denote an empty point. This implies many changes to drivers etc. which get or set nCoordinateDimension.
+Currently a hack to set nCoordDimension negative is used to denote an empty point. 
+
+The removal of nCoordinateDimension may imply changes to drivers etc. which get or set it.
 
 The tests are
@@ -135 +137 @@
 int !CoordinateDimension() should have the new semantics. The method name  in simple features documents actually is without prefix get.
 
-Whether set3D and setMeasured should affect the children geometries in a collection is an issue. Currently doc for setCoordinateDimension says "Setting the dimension of a geometry collection will affect the children geometries.", thus we have already committed to maintaining dimensions of children in collections. It is proposed that set3D and setMeasured either add or strip Z or M values to or from the geometry (including possible children).
+Whether set3D and setMeasured should affect the children geometries in a collection is an issue. Currently doc for setCoordinateDimension says "Setting the dimension of a geometry collection will affect the children geometries.", thus we have already committed to maintaining dimensions of children in collections. It is proposed that set3D and setMeasured either add or strip Z or M values to or from the geometry (including possible children). In general the strategy should be to follow the existing strategy regarding Z (i.e., to strip or add).
 
 Add property double m to class OGRPoint. Add constructor, getters, and setters for it.
@@ -185 +187 @@
                                        int * pnMaxPoints,
                                        int * pnReadPoints );
-void CPL_DLL OGRMakeWktCoordinateM( char *, double, double, double, double, int ); // int = 3 means XYM, int = 4 means XYZM
+void CPL_DLL OGRMakeWktCoordinateM( char *, double, double, double, double, int ); // int = flags OGR_G_3D OGR_G_MEASURED
 }}}