Geographical data

From Intamap

GML3.1 is the standard proposed by the Open Geospatial Consortium. The GML3.1 specifications can be downloaded from here. GML3.1 has an observation schema that can be used to encode the observation process and result. The schema also includes grid definitions which can be used to return our results. GML3.1 can define two types of grid; normal grids and recified grids, and can include the data values inline, or using a reference to an external file - I have not tried the later but from the spec it looks like one can work with tiff or other file formats? The right place to look is the coverage schema - grids are a subset of this. I do recall seeing something recently from OGC for raster data that came after GML - I need to look at this ... on the list! Note the GML2 is not powerful enough to be relevant to the project.

We need to think about how to represent our (posterior) uncertainty. See discussion on Standards for representing uncertainty and Schema for Uncertainty: discussion of how to represent uncertainty in XML.

Projections related issues can be found here,