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
Folks, there has been much made that Oracle Spatial is proprietary and that alternate implementations had to be done because the Sdo_Geometry implementation is not SQL/MM compliant. What many do not know is that, since 10gR1, Oracle has implemented a wrapper set of objects over the top of their Sdo_Geometry implementation (limitations in Oracle objects made thisRead 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
The following is an introduction to the PL/SQL packages downloadable from this site. The following is an example of how the GF ( G eometry F actory) package was used to implement the rounding of the vertices of an Sdo_Geometry object to the tolerances specified in the DIMINFO structure of a USER_SDO_GEOM_METADATA entry. New users of OracleRead 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
Finally, I have finished enough recoding of my PL/SQL packages and object types for Oracle Locator/Spatial to make them available on my site. The oracle_spatial_packages_and_types.zip file contains all my Oracle Spatial Packages and Types. The package should be installed into a schema called CODESYS. A create_schema.sql script is supplied which should be run as system.Read More
I wrote this blog originally on the 18th of August when the announcement first hit my intray. I kept it hidden until I was happy with the factualness of the information it contains. Earlier this year MapInfo announced that the release of version 4.9 of SpatialWare for SQL Server (2005). (SQL Server 2000 is stillRead More
Interesting world we live in where a company that has a standards certificate from a body that another company who is a voting member on criticises its spatial implementation for not being standards compliant. But, as the cynical poster says: “The nice thing about standards is that there is so many of them”. Or, “IfRead More