Lesson 7 Spatial Analysis
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| Geographic Information System (GIS) | Computerized mapping system
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| Spatial Data | Data that has a spacial reference (coordinate system, etc.)
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| Topographic Map | Two-dimensional representation of a portion of the three-dimensional surface of the earth
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| Global Positioning Systems (GPS) | System of satellites, computers, and receivers that is able to determine the latitude and longitude
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| Topographically Integrated Geographical Encoding and Referencing (TIGER) | Uses for Census data
Includes streets, railroads, zip codes, and landmarks
Often used as a base layer
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| Digital Aerial Photography | Photographs taken (usually) from an airplane
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| Digital Elevation Models (DEMs) | Show digital data about the elevation of the earth's surface as it varies across communities allows planners to analyze and map it
Can be used storm water management, flood control, land use and other purposes
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| Light Detection and Ranging (LIDAR) | New technology using a laser that is mounted in an airplane to provide detailed topographic information
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| UrbanSim | Simulation software program that models planning and urban development
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| CommunityViz | Software program that allows agencies to create 3D images
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| Geodesy | Measure and representation of the earth
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| Datum | Approximation of earth surface (geoid) as an ellipsoid to compute location
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| Projections | Mathematical transformation from ellipsoid to plane
Projects distort at least one of these characteristics: shape, distance, direction or land area
Most common: conic & cylindrical
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| Types of Projections | Conformal: shape
Equal Area: Area
Equidistance: distance
True Direction: Direction
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| Four Fundamental Characteristics of Mapping | Shape
Distance
Direction
Land Area
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
amshinn18
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