Download presentation
Presentation is loading. Please wait.
Published byLucas Bollen Modified over 10 years ago
1
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 KEEP THIS TEXT BOX this slide includes some ESRI fonts. when you save this presentation, use File > Save As > Tools (upper right) > Save Options > Embed TrueType Fonts (all characters) this will allow vector maps created with common ESRI symbols to show on computers that do not have ESRI software loaded a a a a a a ESRM 250/CFR 520 Autumn 2009 Phil Hurvitz Finding GIS data Importing GIS data 1 of 65
2
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Finding and importing data sets Searching for data Importing data 2 of 65 Overview
3
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 3 of 65 Overview
4
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 4 of 65 Overview
5
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Primary method for searching for general data on the net (+) Keyword searching (+) Logical parsing of searches (+) Search is far and wide (+) Possible to use meta-searchers (+) Graphical results (–) Low precision 5 of 65 Searching for data: Web search engines
6
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Search for GIS & data 6 of 65 Searching for data: Web search engines results are fairly good
7
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Search for GIS & data & Washington 7 of 65 Searching for data: Web search engines results are NOT good
8
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Why are web search engines not the best tool for searching GIS data? Search engine indexes are created by spiders Spiders only find and index keywords, not meaning Searching for keywords is not efficient Too many erroneous matches Not a true database query No spatial coordinates in normal search engines Too many dead ends and broken links No standard format for searching various engines 8 of 65 Searching for data: Web search engines
9
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 9 of 65 Overview
10
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Better/more efficient methods are needed for obtaining GIS data Federal Geospatial Data Committee (FGDC) Federal agency with mission to increase access/use of geospatial data National Spatial Data Infrastructure ( NSDI) Coordinated effort among many participants 10 of 65 Searching for data: NSDI
11
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 NSDI Geospatial Data Clearinghouse Built on a distributed database Database is Z39.50 compliant (international library data standard) Queries are run against specific fields rather than as simple keywords Fields are specifically for geospatial data description 11 of 65 Searching for data: NSDI GDC
12
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Specific GDC server network built on top of the Network Use of common search engine Metadata (data about data = data description files) are the keystone 12 of 65 Searching for data: NSDI GDC
13
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Content-standardized metadata is the foundation of a robust searching tool Records for individual data sets contain data for specific fields, e.g., Title Abstract Spatial extent, projection, coordinate system Data type Currency of time scale Source scale Developer/Contact information 13 of 65 Searching for data: NSDI GDC: Metadata
14
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Metadata records are indexed into international library standard (Z39.50 protocol) databases Specific sites containing indexes (nodes) are registered with search server sites Searching functions are embedded in web interfaces Searches can be limited to individual nodes or to many nodes Databases are searchable across TCP/IP networks (web, simple terminal) Results are displayed in web pages This is impossible with a simple Google search! 14 of 65 Searching for data: NSDI GDC: Indexed databases
15
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Search by place name or geographic location 15 of 65 Searching for data: NSDI GDC: Searching
16
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Search by time period or various other fields 16 of 65 Searching for data: NSDI GDC: Searching
17
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Select node to search 17 of 65 Searching for data: NSDI GDC: Searching
18
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Number of hits is displayed 18 of 65 Searching for data: NSDI GDC: Results
19
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Individual record titles can be viewed 19 of 65 Searching for data: NSDI GDC: Results
20
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Individual records can be read 20 of 65 Searching for data: NSDI GDC: Results
21
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Distribution information should be included 21 of 65 Searching for data: NSDI GDC: Results
22
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Drawbacks: Content is not always up to date Metadata records have no requirement to provide actual data sets! Links may be bad 22 of 65 Searching for data: NSDI GDC: Results
23
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 23 of 65 Overview
24
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 By quadrangles of different size and scale 24 of 65 USGS Data Organization
25
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 A tremendous amount of data area available for free (who paid??) Data sets representing USGS topographic quadrangles Data from paper maps converted to digital format DEM (raster elevation) data Vector data for a variety of themes Variety of source scales 25 of 65 Searching for data: USGS GeoData site
26
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 7.5 (1:24,000) topographic quadrangle vector data series 26 of 65 Searching for data: USGS GeoData site
27
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Interactive searching 27 of 65 Searching for data: USGS GeoData site: Downloading
28
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Interactive searching 28 of 65 Searching for data: USGS GeoData site: Downloading
29
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Interactive searching 29 of 65 Searching for data: USGS GeoData site: Downloading
30
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Individual files for a quad can be downloaded 30 of 65 Searching for data: USGS GeoData site: Downloading
31
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Available files are listed 31 of 65 Individual files for a quad
32
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 32 of 65 Overview
33
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 The Geography Network Server network built on ESRI technology Searchable Some data available for download Some free Some at a cost Much live data (can add to ArcGIS but not download) 33 of 65 The Geography Network
34
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching is easy 34 of 65 The Geography Network
35
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Using live data from the Geography Network 35 of 65 The Geography Network
36
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 36 of 65 Overview
37
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 University of Washington Map Library Geospatial Data Archive http://wagda.lib.washington.edu Staffed by GIS Librarians Should be your first stop when searching for GIS data UW is a depository library: lots of items available Located in Suzzallo Library basement Data repository for Washington and PNW data Both on-line and off-line (e.g., CD/DVD) data sets City of Seattle GIS database King County GIS database 10 m USGS DEMs Large collection of paper maps & aerial photos 37 of 65 Searching for data: WAGDA
38
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Main WAGDA site 38 of 65 Searching for data: WAGDA Web page
39
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Example: City of Seattle data 39 of 65 Files on WAGDA
40
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Example: Seattle digital orthophoto data 40 of 65 Files on WAGDA
41
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Searching for data Web search engines NSDI Geospatial Data Clearinghouse USGS GeoData site The Geography Network University of Washington Map Library Geospatial Data Archive (WAGDA) GIS Data Depot 41 of 65 Overview
42
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 GIS Data Depot: www.gisdatadepot.com Lots of free data US data Worldwide data Official source for USGS DEM data sets 42 of 65 GIS Data Depot
43
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Lots of free data for the US and the world 43 of 65 GIS Data Depot
44
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 44 of 65 GIS Data Depot
45
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 GIS Data Depot 45 of 65
46
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 46 of 65 Overview
47
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 47 of 65 Overview
48
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 ArcInfo has been a leading software ArcInfo has a very common file format for movement of data Known as interchange, export, or E00 file Solves ArcInfo file system problem for data sharing Easy to transfer from machine to machine or across file system; easy to distribute via the Network Can be imported to ArcGIS 48 of 65 Importing data: ArcInfo interchange file
49
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Distributed file layout of ArcInfo coverage 49 of 65 Importing data: ArcInfo file structure some of these files are associated with this data set
50
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Problematic file structure for file management Directories for ArcInfo data sets cannot be altered, copied, or moved arbitrarily The interchange file packages the coverage directory and info files into a single file The interchange file can be copied or moved and then imported Importing recreates original file structure 50 of 65 Importing data: ArcInfo file structure
51
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Import with ArcToolbox 51 of 65 Importing data: ArcInfo file structure: ArcToolbox
52
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 52 of 65 Overview
53
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Coordinates from an ArcInfo coverage in a specially formatted text file created by ArcInfo Workstation 53 of 65 ArcInfo generate file
54
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Imported with ArcCatalog 54 of 65 ArcInfo generate file
55
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 55 of 65 Overview
56
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Spatial Data Transfer Standard Publicly available data sets Distributed by USGS in SDTS file format USGS digital elevation model (DEM) data USGS digital line graph (DLG) vector data 56 of 65 Importing data: SDTS files
57
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 DEM: Imported with ArcToolbox 57 of 65 Importing data: SDTS files: USGS DEM data
58
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 58 of 65 Overview
59
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Digital Line Graph (DLG) Vector format data Publicly available data sets Distributed in SDTS file format ArcInfo Workstation needed for full conversion of SDTS to GIS data sets 59 of 65 Importing data: SDTS files: USGS DLG data
60
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 ArcToolbox import 60 of 65 Importing data: SDTS files: Importing STDS DLG to DXF limited attributes
61
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 ArcInfo Workstation for full conversion 61 of 65 Importing data: SDTS files: DLG to ArcInfo coverage
62
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Fully converted data set has full attribute coding 62 of 65 Importing data: SDTS files: DLG to ArcInfo coverage
63
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Importing data ArcInfo interchange file ArcInfo generate file Spatial Data Transfer Standard (SDTS) files USGS DEM (raster) data USGS DLG (vector) data DRG 63 of 65 Overview
64
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Digital Raster Graphic (DRG) USGS topographic quadrangles Scanned Georeferenced TIFF format 64 of 65 DRG: Digital Raster Graphic
65
ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2009 Can be used as data set in ArcGIS 65 of 65 DRG: Digital Raster Graphic
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.