3D GIS So far, all data has had x, y coordinates –North-south and east-west 3D requires a z value –Elevation and/or depth Mt. Everest Wordpress.com.

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Presentation transcript:

3D GIS So far, all data has had x, y coordinates –North-south and east-west 3D requires a z value –Elevation and/or depth Mt. Everest Wordpress.com

Elevation: Height of land Typically: –Elevation above “mean sea level” –By default, from the ellipsoid defined in the datum Can have a “vertical datum” –Typically local datums Shuttle Radar Telemetry Mission (SRTM) Jet Propulsion Labs

Bathymetry Depth below “mean sea level” Frank A. Palmer and Louise B.Crary, that collided and sank in Massachusetts Bay in 1902.

Crater Lake Bathymetry From over 2000 surveys Wikimedia.org

ArcScene – 3D Viewer

Start with a DEM

All Layers at 0 Elevation

3D Settings Elevation From Features Elevation from surfaces

Navigating 3D

X, Y, Z Wikipedia Not: Adobe

Pitch, Yaw, and Roll copterix.perso.rezel.net

Three Dimensions: X, Y, Z Six degrees of freedom! Wikipedia

Moving Around

Adding Data

With Base Heights Set

Problems

Uses for ArcScene Esri

3D points displayed in volume space DOE/OSU

Can also create animations See youtube BpQAMhttp:// BpQAM –Artificial terrain fly through (not ArcScene) aT87ohttp:// aT87o –With music in ArcScene (you can do better) Note: ArcScene is not a gaming engine!

Temporal Data Adding temporal data to visualizations: –Land use change over time (NLCD) Elevation and remotely sensed changes Esri has added some temporal features: –Date/Time attributes –ArcMap is still basically a 2D application More complex temporal analysis and visualizations require special software

ArcGlobe?