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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,

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Presentation on theme: "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,"— Presentation transcript:

1 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, Finding and importing data sets Searching for data Importing data 2 of 65 Overview

3 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, Select node to search 17 of 65 Searching for data: NSDI GDC: Searching

18 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Number of hits is displayed 18 of 65 Searching for data: NSDI GDC: Results

19 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, Individual records can be read 20 of 65 Searching for data: NSDI GDC: Results

21 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Distribution information should be included 21 of 65 Searching for data: NSDI GDC: Results

22 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, By quadrangles of different size and scale 24 of 65 USGS Data Organization

25 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, (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, Interactive searching 27 of 65 Searching for data: USGS GeoData site: Downloading

28 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Interactive searching 28 of 65 Searching for data: USGS GeoData site: Downloading

29 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Interactive searching 29 of 65 Searching for data: USGS GeoData site: Downloading

30 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, Available files are listed 31 of 65 Individual files for a quad

32 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, Searching is easy 34 of 65 The Geography Network

35 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Using live data from the Geography Network 35 of 65 The Geography Network

36 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, University of Washington Map Library Geospatial Data Archive 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, Main WAGDA site 38 of 65 Searching for data: WAGDA Web page

39 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Example: City of Seattle data 39 of 65 Files on WAGDA

40 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, Example: Seattle digital orthophoto data 40 of 65 Files on WAGDA

41 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, GIS Data Depot: 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, 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, of 65 GIS Data Depot

45 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, GIS Data Depot 45 of 65

46 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, 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, 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, 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, Import with ArcToolbox 51 of 65 Importing data: ArcInfo file structure: ArcToolbox

52 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, Imported with ArcCatalog 54 of 65 ArcInfo generate file

55 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, DEM: Imported with ArcToolbox 57 of 65 Importing data: SDTS files: USGS DEM data

58 ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 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, 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, 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, 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, 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, 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, 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, Can be used as data set in ArcGIS 65 of 65 DRG: Digital Raster Graphic


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