Mateusz Łoskot <mateusz <at> loskot.net> writes: > Hi, > > I think this may be of interested within the GDAL community: > > http://www.opengeospatial.org/pressroom/pressreleases/1965
Hi, First time ever I tried to send feedback to OGC. Let's see if my mail went through. I commented two issues: 1. It looks like OGC has defined that origin in georeferencing means the centre of pixel in change number 6: Clarification of the use of CRS and Rectified grid coverage / image georeference with origin point (at pixel center). Is this interpretation right and could it be expressed in some fool proof way, like "Origin of the RectifiedGrid is placed at the centre point of the corner pixel" 2. Throughout the paper srsNames are given in two different ways. - srsName="http://www.opengis.net/def/crs/EPSG/0/4326"; - srsName="urn:ogc:def:crs:EPSG::4326" In one example there is even this. - srsName="EPSG:4326" I believe that it means that both http and urn versions can be used but there was not enough room in the 91 pages long document to tell that. Perhaps the meaning is to be explicit and therefore there is a reference to another document with number OGC 07-092r3 http://portal.opengeospatial.org/files/?artifact_id=30575 However, reading OGC 07-092r3 does not help, that document does not mention at all that srsName="http://www.opengis.net/def/crs/EPSG/0/4326"; could be used but it knows only the urn syntax. The same thing in with units of measures. There is a table 3 "URIs for units-of-measure" that gives examples of how to refer to UoM and they are like - http://www.opengis.net/def/uom/OGC/1.0/metre or - http://www.opengis.net/def/uom/EPSG/6.3/9001 But in XML examples UoMs are expressed mostly as - uom="urn:ogc:def:uom:EPSG::9001" There seems to be also at least one copy-paste error in the examples: <Envelope srsName="http://www.opengis.net/def/crs/EPSG/0/4326"; axisLabels="Lat Long" uomLabels="deg deg" srsDimension="2"> <lowerCorner>270379.500 3942462.000</lowerCorner> <upperCorner>518842.500 3942462.000</upperCorner> </Envelope> -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
