Changes between Version 10 and Version 11 of WKTRaster/SeamlessArchitecture


Ignore:
Timestamp:
07/19/11 06:40:24 (14 years ago)
Author:
bnordgren
Comment:

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  • WKTRaster/SeamlessArchitecture

    v10 v11  
    2929== A tour of ISO 19123 ==
    3030
    31 The association of spatial information to numeric value is the fundamental building block of the ''coverage'' spatial type defined in [http://docs.codehaus.org/download/attachments/31212/ISO19123 Primer.pdf ISO 19123]. Individual associations, even aggregations of associations, are not themselves coverages. This architecture leverages the concepts developed in ISO 19123, in as far as they are applicable, in order to avoid reinventing the wheel. The intent is not to provide a conforming implementation, but to identify parallels. A complete coverage implementation may be able to leverage the building blocks defined by this architecture as a back end. With respect to the goals of this architectural definition, the principal benefit of leveraging the coverage toolbox is to aid the definition of a means to uniformly interact with fundamentally different data types.
     31The association of spatial information to numeric value is the fundamental building block of the ''coverage'' spatial type defined in [http://docs.codehaus.org/download/attachments/31212/ISO19123%20Primer.pdf ISO 19123]. Individual associations, even aggregations of associations, are not themselves coverages. This architecture leverages the concepts developed in ISO 19123, in as far as they are applicable, in order to avoid reinventing the wheel. The intent is not to provide a conforming implementation, but to identify parallels. A complete coverage implementation may be able to leverage the building blocks defined by this architecture as a back end. With respect to the goals of this architectural definition, the principal benefit of leveraging the coverage toolbox is to aid the definition of a means to uniformly interact with fundamentally different data types.
    3232
    3333This architecture deals only with a very limited profile of the toolbox defined in ISO 19123. Specifically, geometric objects are limited to 2 coordinate dimensions (x,y or lat,lon) and 0, 1, or 2 topological dimensions (points, lines, and polygons). In addition, the data types of associated values are constrained to numeric types (integers and floating point numbers of various sizes.) These limitations define the common ground between the capabilities of image formats (which persist raster data) and the vast majority of systems capable of handling geospatial data.
    … …  
    196196 * [http://www.cef-cfr.ca/uploads/Membres/WKTRasterSpecifications1.0.pdf Original WKT Raster presentation] (now Postgis Raster)
    197197 * [http://trac.osgeo.org/postgis/wiki/WKTRaster Postgis Raster Home Page]
    198  * [http://docs.codehaus.org/download/attachments/31212/ISO19123 Primer.pdf ISO 19123 Primer]
     198 * [http://docs.codehaus.org/download/attachments/31212/ISO19123%20Primer.pdf ISO 19123 Primer]