Archives for October 25, 2006
An updated data link… The Atlantic Coastal Information Portal (ACIP)
is an online catalogue of geospatial data. ACIP is Atlantic Canada's
window on the GeoConnections Discovery Portal, which enables the
discovery of and access to geospatial data for Canada – in particular,
Newfoundland. The resource was formerly known as the Atlantic Coastal
Database Directory and can now be found at http://aczisc.dal.ca/acip/ –
be sure to check out the search for data option!
At a recently attended event involving visual analytics, a number of advanced prototypes were unveiled in the field of data mining, visualization, ontology, and interrelationships between structured and unstructured, spatial and non-spatial information. The overall intent is to develop systems to detect “signal in the noise” associated with national and homeland security. Clearly, as was evidenced by university, government, and private enterprise, GIS systems have become core components of these applications, expressing the spatial component of information as part of the overall visualization applications. Global projections, including Google Earth, NASA’s Wordwind, ESRI’s ArcExplorer client, and custom applications, were prevalent as well. However, out of all of the applications this author observed and interacted, the most impressive application involved the efforts of the University of Washington’s exploration into the convergence of GIS and VR (Virtual Reality). Seventeen years ago, the concept of utilization a spatially-enabled database as a data engine for VR constructs was a significant idea, but the computing challenges and VR HMD (Head Mounted Display) requirements were significant. Entire, large rooms of computers were required to generate, sustain, and allow for successful interaction within a Virtual World (VW). However, sitting at a simple table with one computer, modified HMD, and the willingness to achieve GIS integration with VR, the UW researchers demonstrated the ability to be immersed in the spatial information. In one instance, it was possible to engage in a high-resolution satellite image of a major urban area, visualize identified target threat features, experience near real-time sensor messaging, and other components through the VR interface. This is achieved through a novel application of VR HMD tracking and the projection and calibration of the geospatial scene onto a small white-board held by the user. The white-board has predefined focal points that are used to tie the spatial image projection into a coordinate space for VR perception. This is no small achievement. Moving beyond plasma screens, touch-tables, stereoscopic screens and glasses for 3D, the GIS-VR integration developed by the University of Washington team in association with other partners represents a next-generation level of geospatial experience. You, the observer, are placed literally into the geospatial data construct in real-time, and experience both 3- and 4D capabilities with the integration of the sensor messages broadcasts from the urban environment. Equally impressive is to review the progress that has been made in VR technology to able to experience this geospatial construct without a massive computing center and the requirement to generate the geospatial features as simulacra. The experience was with actual spatial data as derived from remote sensing, GIS, and spatial sensor messaging (XML-based as SOA). Seventeen years after this author discussed the integration of VR and GIS, significant achievements have been made. The spatial database has evolved as a viable data source for VR worlds, ushering in a new day in advanced visual analytics and the cognitive processes associated with geospatial perception.
— Posted by – Alex Philp, GCS Research
I’ve been messing around a bit more with the new Google custom search today and have created a custom search page for the GISuser website search results. You can access the search page HERE… please feel free to contribute GIS related websites to be included in the search spider. Only GIS-relevant websites please… enjoy! Once i have a bit of time I have a few hundred excellent resources to include!
I’ve been messing around with the new Google custom search today and have created a custom search page for the GISuser website search results. You can access the search page HERE… pleaase feel free to contribute GIS realated websites to be included inn the search spider.
GEO helps to coordinate GIS activities in the state, facilitates communication about GIS issues, and maintains the website that hosts statewide geospatial data for the State of Oregon, the Oregon Geospatial Data Clearinghouse (OGDC). GEO is primarily funded through an assessment paid by all state agencies. Their mission is simple… To provide statewide leadership in promoting the use of GIS technology and to ensure the availability of easily accessible, high quality geographic information. Many data themes are online in the spatial data library and the library is available to users as a web service (interactive webmap) or a download repository (html). Data themes available include:lakesstreamscensusgeologyDOQDRGPLSSSchool Districts and much more – see http://www.gis.state.or.us/data/alphalist.html
The RIGIS mission is to monitor, coordinate, and provide guidance for activities related to the use of geographic information system technology in Rhode Island, to support initiatives to implement or use this technology, and to manage and provide access to a comprehensive database of geographically referenced information. Plenty of data is available including 1:12,000 true color orthophotography from Summer 2003 with a 1 meter pixel resolution. Numerous data themes are available including:
Boundaries (municipal, shoreline, villages)
Access RIGIS at http://www.edc.uri.edu/rigis