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Geographic Information Systems in Water Resource Management: Understanding Latitudes and Geodatabases

Learn about the essential concepts from the 2012 Midterm by David Maidment, including the definition of latitude, geodatabases, feature datasets, geometric networks, and more. Explore the ArcGIS tools like Slope and Aspect for terrain analysis.

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Geographic Information Systems in Water Resource Management: Understanding Latitudes and Geodatabases

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  1. GIS in Water ResourcesConcepts from Midterm 2012 David Maidment

  2. Definition of Latitude, f m p S n O f q r (1) Take a point S on the surface of the ellipsoid and define there the tangent plane, mn (2) Define the line pq through S and normal to the tangent plane (3) Angle pqr which this line makes with the equatorial plane is the latitude f, of point S

  3. Geodatabase – a store for all types of geospatial information

  4. Workspace Geodatabase Feature Dataset Feature Class Geometric Network Relationship Object Class ArcGIS Geodatabase

  5. Subwatershed Precipitation by Thiessen Polygons • Thiessen Polygons • Intersect with Subwatersheds • Evaluate A*P Product • Summarize by subwatershed

  6. a b c d e f g h i ArcGIS “Slope” tool

  7. ArcGIS Aspect – the steepest downslope direction

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