Advanced GIS Using ESRI ArcGIS 9.3 3D Analyst part 2.

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    03-Jan-2016

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Geographic Information Systems

AdvancedGISUsingESRI ArcGIS 9.33D Analystpart 23D AnalystTIN to Raster

TINs are very slow to generate and refresh

Therefore, once created, it is strongly suggested to rasterize them creating grids of elevations (i.e. raster Digital Elevation Models DEMs)

3D AnalystTIN to Raster

When rasterizing, it is instrumental for a good result to optimize the cell dimension, basing upon source resolution, scale of the final layout etc.

Obviously, the size of the resulting raster will depend upon the selected cell size

3D AnalystTIN to Raster

Result

3D AnalystTIN to Raster

The default color ramp for the resulting raster is the gray scale; generally, it is better to change it, also using a stratch metod capable of optimizing the visualization

3D Analyst

TIN to Raster

6 types of stretches are available:

None

Custom

Standard deviations

Histogram equalize

Maximum-minimum

Histogram specification

3D AnalystTIN to Raster

Stretching

NoneNo stretch will be applied

The lowest value in the range will be represented with the starting color and the highest DN with the ending color.Equal differences of DN will always result in equal distances along the color ramp.

3D AnalystTIN to Raster

Stretching

Maximum-minimumSame as None, but minimum and maximum values can be edited; DNs will be subject to linear stretch accordingly

3D AnalystTIN to Raster

Stretching

Standard deviationsColors will be non-linearly stretched basing upon fractions of the standard deviation of the distribution of the source values.

3D AnalystTIN to Raster

Stretching

Histogram equalizeColors will be distributed according to the distribution of DNs; therefore, ranges with frequent values will show a larger difference in color than an equally wide range of less frequent values

3D AnalystTIN to Raster

Stretching

CustomThe relationship between DN and color will be determined by a curve/polyline freely edited on the histogram

3D AnalystTIN to Raster

Stretching

HistogramspecificationAllows to load a previously saved mode for stretching

3D AnalystTIN to Raster

TIN derived maps

It is possible to rasterize maps of slope angle or aspect (i.e. the modular and directional values of the vector representing the first derivative of the elevation z with respect to the planimetric position x,y) directly from a TIN

3D AnalystTIN to Raster

TIN derived maps

Slope angle

3D AnalystTIN to Raster

TIN derived maps

Slope aspect

3D AnalystSurface analysis

TIN derived maps

Slope angle and aspect

Slope angle and aspect can be calculated (from a TIN or a tingrid) also using the Surface analysis set of tools

3D AnalystSurface analysis

TIN derived maps

Hillshade

The same set of tools allow also to generate a shaded map, created according to a light source, freely located in the 3D space above the 3D model.The default position is N315 (i.e. NW) with a zenith of 45.

3D AnalystSurface analysis

TIN derived maps

Hillshade

Result

3D AnalystSurface analysis

TIN derived maps

Relief

Combining the hillshade map with the tingrid with proper transparency, a map effectively depicting the relief can be created.This will be displayed much faster than the shaded TIN.

3D AnalystSurface analysis

TIN derived maps

Contours

TIN and tingrids can also be used to generate vector contour maps. The base contour and interval can be freely chosen.

3D AnalystSurface analysis

TIN derived maps

Contours

Result

3D AnalystSurface analysis

TIN derived maps

Viewshed

It is also possible to delineate the areas visible from the feature(s) contained in a 3D shapefile.

3D AnalystSurface analysis

TIN derived maps

Viewshed

Result

3D AnalystSurface analysis

Area and Volume

It is possible to calculate area and volume for a 3D surface located either above or under a given elevation.It is also possible to store the above values in a text file

3D AnalystSurface analysis

TIN derived maps

Cut / Fill

It is possible to compare two TINs (or tingrids) of the same area to highlight local differences in elevation, storing the result as a raster file.

3D AnalystSurface analysis

TIN derived maps

Cut / Fill

Result

3D AnalystReclassify

TIN derived maps

It is possible to recassify a ruaster, passing from continuous values to classes

3D AnalystReclassify

Example of reclassification of a slope angle map

3D AnalystReclassify

Example of reclassification of a slope angle map

Result

3D AnalystConvert

2D features to 3D

Adds the Z value to any 2D vector feature, generally extracting it from a TIN

3D AnalystConvert

Raster to TIN

A TIN will be created connecting the center of each cell at the elevation stored in it.Almost never used.

3D AnalystConvert

TIN to Features

Converts the information stored into the TIN into Polygon or Point features

3D AnalystConvert

TIN to Features

Converts the information stored into the TIN into Polygon or Point features

3D AnalystConvert

TIN to Features

Converts a raster to a Polygon or Polyline or Point feature.

Will be discussed in the Spatial Analyst, as well as the Interpolation

3D AnalystOptions

General

3D AnalystOptions

Extent

3D AnalystOptions

Cell Size

3D AnalystIcons

3D AnalystIcons

Create Contours

Creates a contour passing from a point (selected clicking on the map)

3D AnalystIcons

Create Contours

Creates a contour passing from a point (selected clicking on the map)

3D AnalystIcons

Create Steepest Path

Creates a line following the steepest path from a selected point

3D AnalystIcons

Create Line of Sight

Creates a straight line connecting two points (different color where underground)

3D AnalystIcons

Interpolate Point

Creates a 3D point where clicked desuming the z value from the active TIN (or tingrid).

3D AnalystIcons

Interpolate point

When editing a 3D Point shapefile, the point will be stored in it.

3D AnalystIcons

Interpolate Line

Creates a 3D polyline where clicked desuming the z values from the active TIN (or tingrid).

When editing a 3D Polyline shapefile, the polyline will be stored in it.

3D AnalystIcons

Interpolate Polygon

Creates a 3D polygon where clicked desuming the z values fot its boundary from the active TIN (or tingrid).

When editing a 3D Polygon shapefile, the polygon will be stored in it.

3D AnalystIcons

Create Profile Graph

Once interpolated (and selected) a Line, a profile graph will be created

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Properties

Series

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Properties

Appearance

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Properties

Appearance

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

General

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis - Scales

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Title 1

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Title 2

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Labels 1

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Labels 2

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Ticks

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis Minor

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Axis - Position

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Titles - Style

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Titles - Format

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Titles - Gradient

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Titles - Shadow

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Legend - Style

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Legend - Symbols

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Panel - Background

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Panel - Borders

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Paging

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Walls

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Data

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Themes

3D AnalystIcons

Create Profile Graph

Right clicking on the graph, it is possible to manage it

Advanced Properties

Themes

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