1 / 18

3D Analyst

3D Analyst. Components. ArcScene Is where 3D Analyst is located Visualization and Some Analysis ArcGlobe Like Google Earth – google’s is better ArcMap - does NOT display 3D! ArcCatalog – can preview in 3D. 3D Data. Has a Z value Elevation is most common Z value

candra
Télécharger la présentation

3D Analyst

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. 3D Analyst

  2. Components • ArcScene • Is where 3D Analyst is located • Visualization and Some Analysis • ArcGlobe • Like Google Earth – google’s is better • ArcMap - does NOT display 3D! • ArcCatalog – can preview in 3D

  3. 3D Data • Has a Z value • Elevation is most common Z value • But can also represent • Pollution levels • Noise levels • Precipitation …. Etc.

  4. Kinds of 3D data structures • DEM raster • TIN (Triangulated Irregular Network)

  5. TIN • Every 3 points of Z are connected to make a Triangle w/ Area, Slope, and Aspect.

  6. 3D view • Open ArcScene • Load DEM or TIN • Raster will be flat! • Set base height • Set vertical exaggeration • Illumination of DEM

  7. Navigation tools different • General nav tool • Zoom tool Fly tool • Guess what? • Expand field of view • Narrow Field of View Done while we go through these demos

  8. Vertical Exaggeration • Why? • used to emphasize small changes • bring z-units into proportion with x,y units • It is a only visual effect that does NOT affect analysis

  9. Illumination • Every Scene has a light source – the sun • Thus different parts of the scene are illuminated differently • The sun’s position is described by… • The sun’s azimuth is measured from 0 (north) to 360 (north) ccw. (315 (NW) is default) • The sun’s altitude (0-90) is its height above the horizion.

  10. DEMO

  11. Layer Properties • Base Heights • establishes the elevations of surface locations and features. • Extrusions • tells 3D Analyst how high a feature rises above the ground or extends below it.

  12. Base Heights • Elevation values that are used to display a layer in 3D. • These values can come from various places. • layer: • the node elevations in a TIN, • the cell values in a raster, • the z-values in a 3D feature layer, • or the elevation attribute values for a 2D feature layer.

  13. Rendering • In layer’s properties • Scene Layer properties

  14. Extrusions • three-dimensional extension of features. • An extruded point  a line; • an extruded line  a wall; • an extruded polygon  a chunk. • There are many methods used to do this

  15. Surface Calculations • Slope • Aspect • Hillshade • Contours • (Reclassification) • Pretty much the same as ArcGIS but tools in 3D Analyst Tools

  16. DEMO

  17. Adding 2D data • Turning on in TOC does not do much – maybe can’t even see it! • Have to set the layer’s elevations • Layer properties/Base Heights from DEM

  18. DEMO

More Related