Working with Imagery in ArcGIS 10

72 Pages·2011·3.78 MB·English

by  Jennifer Kuntz

Working with Imagery in ArcGIS 10
Jennifer Kuntz
Overview of Presentation
• Imagery Overview
• Display “Looks Great, Draws Quickly”
- Image Analysis Window
- Acceleration
• Process
- Image Analysis Window (part 2)
- Data Extraction
• Manage
• Serve
What is imagery in ArcGIS?
Imagery is raster data
- Aerial photography
- Satellite imagery
- Thermal imagery
- Digital elevation models
- Scanned maps
- Land classification
- Surfaces created
from analysis
Adding Imagery and Raster Data
• File on disk
• Geodatabase
Mosaic dataset
• Stored like a raster catalog
• With more capabilities
• Metadata is stored in attributes
• User experience like a raster dataset
Adding Imagery and Raster Data
ArcGIS Online Map Service
Image Service WCS / WMS Service
Raster Properties
• Data source
- Type of file and location
• Raster information
- Information about the pixels
• Extent
- Top, bottom, left and right extents
• Spatial reference
- Coordinate system information
• Statistics
- Min, max, mean, and standard deviation (per band)
Raster Datasets - Properties
• Pyramids
Factor of 2
- Reduced resolution copies of the source
- Improve display performance
- Support three resample methods
- Can be compressed (new)
Nearest Bilinear Cubic
• set in GeoProcessing environment
neighbor interpolation convolution
• Statistics
Stretched:
Unstretched:
- Enhance visual display Min: 0
Min: 24
Max: 255
Max: 241
• Build Pyramids and Statistics tool (new)
Display
Displaying Raster Data
• Renderers
- Display your data with a renderer that makes your data
look good
• Image Analysis window
- Common capabilities in one easy to access location
Stretched renderer
• Often used for elevation, satellite and aerial imagery
• Default: when raster has more than 25 unique values
- Stretches values along a color ramp