archydro应用和介绍.ppt

Arc Hydro: GIS for Water ResourcesDavid R. MaidmentUniversity of Texas at Austin Arc Hydro Culmination of a 3-yr effort GIS in Water Resources Consortium Customization of ArcGIS for water resources Arc Hydro toolset and application framework GIS in Water Resources Consortium Bringing together these two communities by using a common geospatial data model /giswr ArcGIS Introduces A new geographic data model A new geographic database Stored in an Relational Database (Geodatabase) ArcObjects Component Object Model (COM) objects that access geographic data Works like MS Word, Excel, Powerpoint, …. Geodatabase Model Features Features are geographic objects stored in relational database tables Feature location is an attribute of type shape Point, Multipoint, Line, Polygon Attributes and geometry are stored together not in separate files as in Arc Info 7 and ArcView 3 Feature DataSets A holder for a set of feature classes having a common coordinate system and spatial extent Extensible Data Model 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 Arc Hydro Data Model Data Model Based on Behavior Integrating Data Inventory using a Behavioral Model Arc Hydro USA 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 National Hydro Data Programs/giswr/nhdconf/nationalhydro.html Hydrologic Cataloging Units (HUCS) Catchments, DrainageLines and DrainagePoints EDNA Catchments Arc Hydro Time Series Object National Water Information System Retrieving NWIS Data Select Gage Layer Enter Period of Record Streamflow Time Series Time Series Extracted to Excel(In Excel, use Data/Get External Data to query Geodatabase) HRAP Cells for Nexrad Data Coupling Spatial and