One often meets a question like this (asked on the PostGIS discussion list) about the performance of raster images: Can anyone comment on the “Performance” of the PostGIS Rater or WKTRaster? If you were to serve this onto a web application, how effective are they? Well, I’m talking of very large datasets like 10GB eachRead More
The most critical property of an image catalog that needs to be defined on its creation (using the Catalog Registry Tool) is the size of an individual tile. The scientific basis for what I am about to say was an published paper by Dr Peter R. Lamb (CSIRO Division of Information Technology) entitled: Tiling VeryRead More
On the OSGeo website there is a new posting describing the “Tile Map Service Specification”:http://wiki.osgeo.org/index.php/Tile_Map_Service_Specification From the Document Scope: “This standard specifies the behavior of a service that provides access to georeferenced maps in the form of a regularly spaced set of regularly sized squares at a finite number of scales. This standard specifies operationsRead More
I thought I would start a dedicated section on my site for the Manifold GIS based Image Catalog Tool. Introduction Image catalogs are used in ESRI technology, Manifold GIS and software such as the UMN MapServer. My image catalog tool, while not perfect, does (once you have mastered the tool and built some management practicesRead More
Today I uploaded to this site 2 videos show how to use my Manifold ImageCatalogTool to create, manage and populate disk-based image catalog. Image catalogs are used in ESRI technology, Manifold GIS and software such as the UMN MapServer. My image catalog tool, while not perfect, does (once you have mastered the tool and builtRead More