building gis from imagery dynamic spatial models knowledge bases iii. set of blueprints abc...
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Building GIS from Imagery
Dynamic Spatial Models
Knowledge Bases
III. SET OF BLUEPRINTS
A B C
BLUEPRINT
II. POWER TOOLS
Spectral Processing Ortho-Rectification Feature Extraction Advanced Visualization
I. BUILDING MATERIALS
IMAGERYIMAGERY
Raster Vector Scalar Tabular Matrix
Inputs and Outputs
Viewing
Viewer
Geospatial Light Table Viewer
GPS Link Tool
Real-time image update
Real-time current location
Reads standard NEMA data format
Resolution Merge
25m Multi-Spectral
Spectral Resolution
10m Pan-Chromatic
Spatial Resolution
10m Multi-spectral
Mosaic
Cut (pieces are just ‘stuck’ together)
Cut/Feather entire overlap area
Cut/Feather by Distance
A
B
Default Cutline
Or you can cut along a user defined line
Advanced Mosaicking
Union
Area of Interest: Defined manually or by other feature layer
Map Series (USGS): User and predefined map sheets and databases used to select areas
Multiple ResolutionsMultiple Projections
Image MatchingColor Balancing
Surfacing
1973 1994
Image Difference
Identifying thematic change over time Identifying spectral change over time
Spectral Extraction
BlueGreenRedNear IRMid IR
Supervised and
Unsupervised
Building Signature Libraries
No Limit on Bands
MultibandImagery
Feature Extraction
Automated Feature Extraction
Use Seed Tool to identify and automatically map an area or feature of interest
Feature identified by defining a specific pixel value or range of pixel values
Once the value(s) are defined, all adjacent pixels of the feature are included in the ‘feature boundary’
Can be used as a signature
Unsupervised Classification
User selects number of desired land cover classes or categories
Computer employs an automated clustering algorithm called ‘ISODATA’
‘X’ number of desired categories are matched to ‘X’ most significant ‘pixel-value clusters’ in the imagery
Supervised Classification
User selects number of desired land cover classes or categories
User must then identify areas of interest within the imagery corresponding to each category
Each category based on the ‘spectral signature’ of image pixels within an Area of Interest (AOI)
1. Bare ground AOI1. Bare ground AOI
Supervised Classification
2. Wheat AOI2. Wheat AOI
3. Barley AOI3. Barley AOI
Build Complex Decision
Rules
Expert Classification
Output confidence is expressed as probability
Hyperspectral
Image Sources• AVIRIS • MODIS• GER, ESSI, CASI• NEMO• AIRES
Spectral Libraries• USGS - Mineral• JHU - Mineral• JPL - Mineral• DRI - Vegetation • CSIRO - Veg and man made• NIMA-SITAC - Military
DrawingTools
Editing Comman
ds
Symbol Librari
es
Advanced Cartography
Vector
IMAGINE Native Vector Features
• Arc/Info coverage data model built-in
• Shapefile and Interchange import/export
• Display, symbolization and query
• Edit tools for creating / updating coverages
Vector Module Features
• Vector format import / export to coverage
• Clean and Build topology
• Table Tool
• Zonal Attributes
• Other Utilities
Full Support for Coverage and Shape
Vector Creation and
Editing
Edits from Imagery
Complex Queries and Symbology
Supports SDE with Multiple
Attributes
Vector Editing and Creation
What You Need in Order to Analyze GIS Data in 3D
Elevation data
Fly-Throughs
Create a flight path Set look direction/focal points Set field of view View/edit flight path in 3D Output to a movie or VRML file
+ =
Image or Vector Data
Resample
TRANSFORMS:
• Affine
• Rubbersheet
• Polynomial
Traditional Rectification
Ground Control
Desktop Photogrammetry
Corrects for Sensor and Relief Distortions
Multiple Sensor Models Automatic Tie Points Complex Block Adjustment Rigorous Triangulation Full Support for GPS
Stereo Feature Extraction
Terrain and 3D Feature collection and compilation
Positioned as a “Digital Stereoscope”
Use of geo-referenced stereo-pairs
Collection and update of 3D vector data …SHAPE!
Collection and updates of elevation models
Automatic terrain following cursor
Collecting Data in Stereo
Position measurement Feature measurement Feature collection
Azimuths (strike) Slopes (dip)DistancesAreasAnglesHeight
VirtualGIS
VectorOrthoBASE
Pro
Toolkit
Radar
A Product Suite to Compliment Your GIS
StereoAnalyst
IMAGINEEssentialsIMAGINEAdvantageIMAGINEProfessional
Applications In:
Academia Agriculture Archeology Biology Cartography Engineering Environmental Monitoring Epidemiology Forestry Geology Hydrology
Insurance Meteorology Military Natural Resource Mgt Oil/ Gas Exploration Real Estate Telecommunications Transportation Utilities Urban Planning
Higher Education Annual Kit (HEAK)
ERDAS is committed to helping universities and other institutions of higher learning teach with the the world’s foremost GeographicImaging software.
Level 1 HEAK Example
• 15 Seats of IMAGINE Professional(any combination of platforms)
• 15 Seats of IMAGINE Vector Module
• 15 Seats of IMAGINE VirtualGIS
• 5 Seats of ERDAS MapSheets
• 12 months of Software Subscription Support
Government Agency Users National Park Service Bureau of Reclamation US Border Patrol EPA NOAA NASA FBI CIA Pacific Northwest Labs (Batelle) Jet Propulsion Lab (JPL) US State Dept. US Dept. of Energy Los Alamos National Lab Lawrence Berkeley National Lab US Army COE
US Forest Service US Bureau of Land Mgt. USGS US Fish and Wildlife US Dept. of Agriculture US Bureau of Indian Affairs NASA Dept. of Energy Sandia National Lab Livermore National Lab US Army US Air Force US Marine Corps US Navy Pacific Disaster Center
Commercial Users
Lockheed Martin Boeing Raytheon Grumman Hammon Jensen Wallen Map Factory Ducks Unlimited Space Imaging Aerojet Pacific Meridian Resources Weyerhaeuser Potlach Bechtel
Verizon Wireless Qualcomm Sierra Club Chevron Parson Brinkerhoff Charles Schwab Microsoft GTE The Nature Conservancy TRW McDonnel Douglas Simplot
Large Raster
Files
Reprojection
OrthoRectificati
on
Mosaicing
Cartographic
Topology
GIS Analysis
3D
Visualization
Data I/O
Feature
Extraction
Elevation
Extraction
Change Detection
Power Tools