Arc Hydro: GIS in Water Resources - UF Water Institute

64 Pages·2007·1.58 MB·English

Arc Hydro: GIS in Water
Resources
Seminar/Workshop
Gainesville, Florida –November 15, 2007
Christine Dartiguenave, ESRI inc.
[email protected]
Copyright ©2007 ESRI. All rights reserved. Arc Hydro
Hydrologic Modeling with Arc Hydro Tools 1
What is Arc Hydro?
(cid:139) Extension of geodatabase model for support of
water resources applications (template data
model)
(cid:139) Culmination of a three year process led by D.R.
Maidment through GIS in Water Resources
Consortium (Arc Hydro book)
(cid:139) Collection of tools for support of Arc Hydro
geodatabase design and basic water resources
functions
(cid:139) Starting point for water resources database and
application development
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 2
Hydrologic Modeling with Arc Hydro Tools 2
Overview
(cid:139) Arc Hydro Data Model
(cid:139) Arc Hydro Tools
(cid:139) Model Integration
(cid:139) Applying Arc Hydro
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 3
Hydrologic Modeling with Arc Hydro Tools 3
How “Things” Build Up
(cid:139) Database design
(cid:139) Data preparation
(cid:139) Terrain preparation Generic
(cid:139) “Watershed” delineation
(cid:139) “Watershed” characterization
(cid:139) Parameterization Semi-Generic
(cid:139) Model pre and post-processing Model Specific
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 4
Hydrologic Modeling with Arc Hydro Tools 4
ArcGIS Introduces
(cid:139) New geographic data model
(cid:139) New geographic database Geodatabase
MS Access
(cid:139) Stored in an RDBMS File
Oracle
(cid:139) Many new capabilities SQL Server
Informix
(cid:139) Geodatabase DB2
(cid:139) Persistent store of geographic
information in a DBMS Feature
IFeature IFeature: IRow
IFeatureBuffer IFeatureBuffer: IRowBuffer
IFeatureDraw IFeatureDraw: IUnknown
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 5
Hydrologic Modeling with Arc Hydro Tools 5
Inside the Geodatabase
Geodatabase
Tables, subtypes
Feature dataset
Raster datasets
Spatial reference
Survey datasets
Feature classes (FCs), subtypes
Polygon FC Multi-patch FC Survey folder Survey
Line FC Route FC
Point FC Dimension FC Locators
Annotation FC Addresses
x,y locations Route events
Zip codes Route locations
Relationship classes
Validation rules
Geometric networks Default values Connectivity rules
Attribute domains Relationship rules
Topology Split/Merge policy Topology rules
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 6
Inside the geodatabase
Geodatabases organize geographic data into a hierarchy of data objects. These data objects are
stored in feature classes, object classes, and feature datasets.An object class is a table in the
geodatabase that stores nonspatial data. A feature class is a collection of features with the same
geometry and the same attributes.
A feature dataset is a collection of feature classes that share the same spatial reference. Feature
classes that store simple features can be organized either inside or outside a feature dataset. Simple
feature classes that are outside a feature dataset are called stand-alone feature classes. Feature
classes that store topological features must be contained withina feature dataset to ensure a
common spatial reference.
The geodatabase supports a model of topologically integrated feature classes, that is further
extended with support for complex networks, topologies and relationships among feature classes,
and other object-oriented features.
Feature classes
Collections of points, lines, polygons, or annotation (map text)managed as feature tables.
Related feature classes (i.e., those that participate in a topology or a network) are managed as a
collection in feature datasets.
Raster datasets
Individual images or multi-tiled rasters managed as raster tables.
Tables
A collection of records (rows) and fields (columns) used to represent non-graphic objects (e.g.,
parcel owners).
Hydrologic Modeling with Arc Hydro Tools 6
Template Data Models
Project Data Models
GIS/IT Standards
FEMA HEC …
Templates
ISO Provide an
Important Link
Template Data Models (30+)
Between
FGDC
Project
Arc Hydro Parcel … Teams,
Standards,
OGC
and ESRI
Software
ArcGIS Core Data Model
Development
Industry
Object Feature Topology
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Hydrologic Modeling with Arc Hydro Tools 7
Template Data Model Approaches
Water Resources
Floodplain WQ
Arc Hydro
Permitting
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Hydrologic Modeling with Arc Hydro Tools 8
Arc Hydro Database Definition
(cid:139) A geospatial and temporal data model for water
resources that operates within ArcGIS
(cid:139) Five key conceptual areas
(cid:139)Drainage -Drainage areas and stream lines defined from surface
topography
(cid:139)Flow network -Connected sets of points and lines showing
pathways of water flow
(cid:139)Hydrography -The base data from topographic maps and tabular
data inventories
(cid:139)Channel description -A 3-D line representation of the shape of
river and stream channels
(cid:139)Time series -Tabular attribute data describing time-varying water
properties for any hydro feature
Copyright ©2007 ESRI. All rights reserved. Arc Hydro 9
Hydrologic Modeling with Arc Hydro Tools 9
Arc Hydro Schema
Drainage Network Flow
HydroFeatures
Time
Time Series
Hydrography Channel
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Hydrologic Modeling with Arc Hydro Tools 10