1 / 18

Future of GIS

Future of GIS. GIS & the Internet. Access spatial data interactively anywhere in the world http://www.geographynetwork.com/. Software as a Service. Everyday the Internet is becoming more important in our lives

gage
Download Presentation

Future of GIS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Future of GIS

  2. GIS & the Internet • Access spatial data interactively anywhere in the world http://www.geographynetwork.com/

  3. Software as a Service • Everyday the Internet is becoming more important in our lives • Today I shop, get traffic conditions, compare products, buy tickets, and read product reviews • Today I can’t find restaurants in my area that serve a particular cuisine that can take a reservation at 7PM • Today a business can’t find a vendor that has an item in stock or which vendor is cheapest or which can ship it to me the soonest • There are 2 main reason why services like this don’t exist today • No standard for integrating information (XML Schemas fix this) • It’s too complex to integrate such services

  4. Web Services • Provide a mechanism for packaging functionality across the Internet • Maps with http://411.ca • http://Maps.google.com • Local services with http://www.google.ca • ESRI’s Web Services

  5. Standards • OpenGIS • Based on XML • XML stands for EXtensible Markup Language • XML is a markup language much like HTML. • XML was designed to describe data. • XML tags are not predefined in XML. You must define your own tags.

  6. XML • The motto of HTML is: "I know how it looks," whereas the motto of XML is: "I know what it means, and you tell me how it should look." Said another way, HTML is about making pretty presentations (bold text and neatly formatted tables, etc.) while XML is a semi-structured document that holds "content."

  7. Sample XML Document Fragment Element “start” tag Attribute value - must be quoted Attribute Nested elements must nest completely Element “content” Element “end” tag <LocationReference> <CrossStreetsProfile> <CrossStreetSection side="right"> <onStreetName>I-495</onStreetName> <fromStreetName>Rt.50</fromStreetName> <toStreetName>Braddock Road</toStreetName> </CrossStreetSection> </CrossStreetsProfile> </LocationReference>

  8. Different XML Schemes • GML • GML provides a standard means to encode Geographic Information (position, location, extent etc.) in XML. • ArcXML • ESRI’s version of XML • LandXML

  9. Popular Mechanics, 1954

  10. Changing Emphases:From Data to Analysis Spatial Analysis Spatial 5% Analysis 10-15% Attribute Tagging Attribute Tagging 75% Data Conversion: Data Conversion Past Future

  11. Visual simulation & virtual reality: real time display of how is, and how might be -forest fire -freeway traffic flow Picture worth a thousand words: maps & diagrams of how is, or how was Future Past Changing Emphases From Description to Simulation & Modeling Symbolic models: based on logical relationships in mathematical or statistical form Iconic models: scaled down representations of the real thing

  12. Changing Emphasesfrom 2-D description to 4-D interaction Past • 2-D flat map displays Future • Effective 3-D • 4-D incorporation of time

  13. LIDAR and Digital Imaging A LIDAR system that collects elevations every meter on the ground at a rate of 30,000 times per second or more while a digital camera produces six-inch-pixel data equates to mass quantities of instantaneously available data never dreamed of until recently.

  14. Imagery Processing and Distribution • Promise • Cheaper • better resolution • Problems • image- processing software isn't easy to learn or use; • most geotechnology users don't have access to image-processing software; and • the raw datasets required for image processing can be many gigabytes in size. • Covering the world at one-meter resolution requires a staggering 1,800TB or 1,800,000GB of uncompressed imagery.

  15. Hardware • Cost drop for PC’s • $1,000 -$1500 • Notebooks also much cheaper • PDA’s • Wireless Technology • G1 GSM/GPRS 24 - 36 Kbps • G3-Data rate (up to 2Mbps) • G4-Higher bandwidth (up to 100Mbps). • Support interactive multimedia services: teleconferencing, wireless Internet, etc. • Deployed around 2010 • New 64 bit chips • Intel March 21, 2005 • AMD 18 months ago

  16. Interoperability • Open GIS Consortium (OGC) specifications mature • Normalizes playing field, independent of: • Operating System • Programming Languages • Development Environments

  17. Open Source • Open Source Software • Open Source programs are applications of which you can access the source code. • http://opensourcegis.org/ • OSGeo

  18. WMS & WFS • WMS: Web Map Service • Scope: geographic data rendered as images ("maps"), no actual data values • WFS: Web Feature Service • Scope: storage & retrieval of geographicvector feature data (point/line/polygon) • http://www.demis.nl/quakes/

More Related