Appendix B: Data Sources. In this exercise you will: Find data sources Download needed data

Transcription

1 In this exercise you will: Find data sources Download needed data

2 California data Consult your instructor regarding California data sources. Page 2

3 National Park Service data Consult your instructor regarding National Park Service data sources. Page 3

4 Land use data 1. Navigate your internet borwser to the USGS Historic land use cover page at water.usgs.gov/gis/dsdl/ds240/ index.html The USGS page distributed this data based on 1:250K map coverage, and not by county coverage. You may need to download more than one shaprefile and merge those together. The merge process is described in Exercise 9: Joining two ajoining feature classes (Merge). 2. If unfamiliar with the 1:250K map that corresponds with your county, dowlonad the Tile Index Polygons shapefile. If you are aware of the 1:250K maps needed, skip to step 4 below. The Tile Index Polygons layer is simply a layer with the outlines of the 1:250K maps and the corresponding names. 3. Extract the ZIP file, add the tile index polygon layer and your county outline to an ArcMap document to find out what 1;250K land cover shapefiles you need to download. 4. Download the file or files needed for complete coverage of your county land Use / Land Cover data. 5. Extract the ZIP files where you wish to store the data. Again, if you are using more than one shapefile, you will need to merge each layer together. Directions for this are outlined in Exercise 9. Page 4

5 Modeled urban land growth This data was created in conjunction with the State of California legacy project. For more information regsrding this data, see the Legacy project website at legacy.ca.gov. This data was generated based on an urban growth model created by Dr. John Landis at UC Berkeley. Additional information about this model can be found at iurd.berkeley. edu/research/land_use. 1. Navigate your internet browser to the CAL-Atlas Geospatial clearinghouse website at atlas.ca.gov. 2. Click the download link. 3. Click the Society directory. At the botton of this directory is a data pages for Urban Growth Projected 2020 and Urban Growth Projected Click the Urban Growth Projected 2020 link and download the ZIP file from the subdirectory. 5. Repeat this process for the 2050 data. This data will need ot be extracted from the ZIP fiel format. Once extracted, the data is in Shapefiel format and no other processing is needed. Page 5

6 Task Acquiring header census TIGER/Line features 1. Task 1 The US census beurau has developed a good deal of data other than the the census blocks and tracts most often associuated with the beurau. Much of this additional data is found in the TIGER/Line data, such as waterways, roads, highways, railroads and so on. Each of the lines in the data is assigned a specific MTFCC code to specify the type of line it is. 1. navigate your internet browser to the U.S. Census Bureau TIGER/Line website at 2. Click the link to the most recent version of TIGER/Line data. This will open a new page, describing the data. This page will also provide a link to the download interface. 3. Click the download link. In this task, you will download data specifically for yor county. 4. In the State and County based data drop down menu, select the state where your county is located and click the Submit button. 5. In the county dropdown menu, select your county of interest and click the Submit button. 6. Check the checkbox next to All Lines and click the Download Selected Files button. This will begin the download of a ZIP compressed file containing the lines shapefile. 7. Download the ZIP file and extract the data into a folder. 8. In ArcCatalog, copy this data to your County wide folder and call it TIGER_Lines. File Management When downloading this data, it is especially inmportant that you keep in mind good file management. Once you have extracted the files, you will want to move the data to a more central folder and change the file name to something you will recognize. Page 6

7 Acquiring census block group data Appendix B: Data Sources Every 10 years the U.S. census bearu conducts a population count of the enrtire united states. This data contains not only teh number of individuals, but other demographic information sucha s race and gender. The data is organized first by county. Each county is divided into census tracts. A tract is divided into block groups and again into blocks. In a major city, a block might cover a city block, while in rural areas, a census block would cover a large area. 1. navigate your internet browser to the Cal-Atlas website at atlas.ca.gov. 2. Click the Download link. 3. Click the Society directory. 4. Click the Demographics subdirectory. You will see many differnt Census related data packages. 5. Open the Census(year)bg subfolder. 6. Download the associated ZIP compression file. 7. Extract the file using WinZIP or other decpoompression software. In the extracted directory, you will find a shapefile as well as a detailed DBF table. the shapefile contains the geography and a limited attribute table. The second dbf file contains much more detailed information for each feature in the shapefile. You will eventually join these two tables. 8. Save these files in your California data file in a sub-directory called Census_Data. Page 7

8 Task Acquiring header proposed urban land use 1. Task 1 This data was created in conjunction with the State of California legacy project. For more information regsrding this data, see the Legacy project website at legacy.ca.gov. This data was generated based on an urban growth model created by Dr. John Landis at UC Berkeley. Additional information about this model can be found at iurd.berkeley. edu/research/land_use. 1. Navigate your internet browser to the CAL-Atlas Geospatial clearinghouse website at atlas.ca.gov. 2. Click the download link. 3. Click the Society directory. At the botton of this directory is a data pages for Urban Growth Projected 2020 and Urban Growth Projected Click the Urban Growth Projected 2020 link and download the ZIP file from the subdirectory. 5. Repeat this process for the 2050 data. This data will need ot be extracted from the ZIP fiel format. Once extracted, the data is in Shapefiel format and no other processing is needed. Page 8

9 Acquiring USGS land use data 1. Navigate your internet borwser to the USGS Historic land use cover page at water.usgs.gov/gis/dsdl/ds240/ index.html The USGS page distributed this data based on 1:250K map coverage, and not by county coverage. You may need to download more than one shaprefile and merge those together. The merge process is described in Exercise 9: Joining two ajoining feature classes (Merge). 2. If unfamiliar with the 1:250K map that corresponds with your county, dowlonad the Tile Index Polygons shapefile. If you are aware of the 1:250K maps needed, skip to step 4 below. The Tile Index Polygons layer is simply a layer with the outlines of the 1:250K maps and the corresponding names. 3. Extract the ZIP file, add the tile index polygon layer and your county outline to an ArcMap document to find out what 1;250K land cover shapefiles you need to download. 4. Download the file or files needed for complete coverage of your county land Use / Land Cover data. 5. Extract the ZIP files where you wish to store the data. Again, if you are using more than one shapefile, you will need to merge each layer together. Directions for this are outlined in Exercise 9. Page 9