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
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
My latest article was published on Directions Magazine yesterday. The article is Scalable Server-side In-database Geoprocessing (thanks to Nora Parker and Adena Schutzberg). While Tim Osborn gave the presentation (and generated the statistics and charts) all the design and implementation of the performance improvements was done by myself. All ideas have their genesis. It was somethingRead More
Over many years I have created many image catalogs for distribution inside GIS systems and web mapping applications. The main science behind my implementations has been Peter Lamb’s work at the CSIRO (see my links page for the URL to Peter’s web page). What is missing from all GIS around today is abstracted management ofRead More
One of the things that should be taught to GIS students at Uni but isn’t in a lot of courses is the notion of space keys or space-filling curves. The mathematics behind these keys was done before computing by mathematicians like: Giuseppe Peano David Hilbert The one that most GIS people are introduced to isRead More