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GIS in Water Resources: Lecture 1

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  1. GIS in Water Resources: Lecture 1 • In-class and distance learning • Land and water interaction • Geospatial database of hydrologic features • Curved earth and a flat map

  2. GIS in Water Resources: Lecture 1 • In-class and distance learning • Geospatial database of hydrologic features • Arc Hydro data model • Curved earth and a flat map

  3. Lectures Powerpoint slides Video streaming Readings “Modeling our World” Narratives written around slides Homework Term Project Oral presentation HTML report Class Interaction Email Chat room Examinations Midterm, final Six Basic Course Elements

  4. Instructor-Centered Presentation Community-Centered Presentation Learning Styles Instructor Student

  5. Traditional Classroom Community Inside and Outside The Classroom University Without Walls

  6. Utah State University Dr David Tarboton – terrain analysis with digital elevation models Dr Tarboton will present lectures on Oct 8-10

  7. GIS in Water Resources: Lecture 1 • In-class and distance learning • Geospatial database of hydrologic features • Arc Hydro data model • Curved earth and a flat map

  8. Geospatial Database

  9. Levels of Analysis:Relational Database Relational Linkages Spatial Attributes Water Right Locations Descriptive Attributes

  10. Spatial Data: Vector format Vector data are defined spatially: (x1,y1) Point - a pair of x and y coordinates vertex Line - a sequence of points Node Polygon - a closed set of lines

  11. Raster and Vector Data Raster data are described by a cell grid, one value per cell Vector Raster Point Line Zone of cells Polygon

  12. How do we combine these data? Digital Elevation Models Streams Watersheds Waterbodies

  13. An integrated raster-vector database

  14. GIS in Water Resources: Lecture 1 • In-class and distance learning • Geospatial database of hydrologic features • Arc Hydro data model • Curved earth and a flat map

  15. What is Arc Hydro? • An data infrastructure for storing and integrating hydro data within ArcGIS • A set of hydro objects built on top of ArcObjects • A set of standardized attributes • A vocabulary for describing data (glossary) • A toolset for implementing the data model

  16. Drainage System Hydro Network Flow Time Time Series Hydrography Channel System Arc Hydro Components

  17. Arc Hydro Data Model Hydrology Hydrography

  18. Data Model Based on Inventory Streams Drainage Areas Hydrography Channels Terrain Surfaces Rainfall Response Digital Orthophotos

  19. Data Model Based on Behavior Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.

  20. Integrating Data Inventory using a Behavioral Model Relationships between objects linked by tracing path of water movement

  21. Arc Hydro Framework dataset for USA at 1:500,000 scale Built from USGS and National Weather Service data MonitoringPoints are USGS stream gaging stations Arc Hydro USA

  22. Building lot Arc Hydro Applied to an Urban Subdivision Storm sewer Grassy swale

  23. Arc Hydro Framework Input Data Watersheds Waterbody Streams Monitoring Points

  24. Arc Hydro Framework

  25. Hydrologic Cataloging Units (HUCS) Hydrologic Unit Code = 12100203 Guadalupe Basin (4 HUC’s) • 2015 HUC’s cover continental US • average area ~ 1 county

  26. Arc Hydro Framework Dataset for the Guadalupe Basin

  27. HydroNetwork through Canyon Lake Flowlines through water body Generic Junction (for topological connection of edges)

  28. HydroJunction has Waterbody Relationship

  29. GIS in Water Resources: Lecture 1 • In-class and distance learning • Geospatial database of hydrologic features • Arc Hydro data model • Curved earth and a flat map

  30. Origin of Geographic Coordinates Equator (0,0) Prime Meridian

  31. Latitude and Longitude Longitude line (Meridian) N W E S Range: 180ºW - 0º - 180ºE Latitude line (Parallel) N W E S (0ºN, 0ºE) Equator, Prime Meridian Range: 90ºS - 0º - 90ºN

  32. Latitude and Longitude in North America Austin: (30°N, 98°W) Logan: (42°N, 112°W) 60 N 30 N 60 W 120 W 90 W 0 N

  33. Map Projection Flat Map Cartesian coordinates: x,y (Easting & Northing) Curved Earth Geographic coordinates: f, l (Latitude & Longitude)

  34. Representative Fraction Globe distanceEarth distance = Earth to Globe to Map Map Projection: Map Scale: Scale Factor Map distanceGlobe distance = (e.g. 0.9996) (e.g. 1:24,000)

  35. Coordinate Systems A planar coordinate system is defined by a pair of orthogonal (x,y) axes drawn through an origin Y X Origin (xo,yo) (fo,lo)