Changes between Version 11 and Version 12 of mapping


Ignore:
Timestamp:
Jul 3, 2008, 10:59:04 AM (12 years ago)
Author:
Josue Guillen
Comment:

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  • mapping

    v11 v12  
    1010=== The Map Server ===
    1111
    12 The Map Server's job is to read mapping data files and create maps from them (explain more...)
     12The Map Server's job is to read mapping data files and create maps from them.
    1313
    1414MFPL offers [http://mapserver.gis.umn.edu/ mapserver] for all members. Please [/newticket post a ticket] to request access to the map server.
    1515
    16 To get started with our mapserver, you will need to ...
     16To get started with our mapserver, you will need to create a map file, which points to the data you've collected. Check out this [http://biometry.gis.umn.edu/tutorial tutorial] for an introduction.
    1717
    1818Other map servers include: [http://geoserver.org/ geoserver], [http://www.easywms.com/easywms/?q=en/suas suas mapserver], [http://www.openstreetmap.org/ openstreetmap], [http://mapnik.org mapnik].
     
    2020=== Data ===
    2121
    22 ''FIXME: I don't understand what this data is or what you do with it. Is it data that you need to give to the map server? I think I'm missing a conceptual piece here.''
     22The most common data format (currently) is a shapefile. The ESRI Shapefile or simply a shapefile is a popular geospatial vector data format for geographic information systems software. It is developed and regulated by ESRI as a (mostly) open specification for data interoperability among ESRI and other software products. A "shapefile" commonly refers to a collection of files with ".shp", ".shx", ".dbf", and other extensions on a common prefix name (e.g., "lakes.*"). The actual shapefile relates specifically to files with the ".shp" extension, however this file alone is incomplete for distribution, as the other supporting files are required.
     23
     24Shapefiles spatially describe geometries: points, polylines, and polygons. These, for example, could represent water wells, rivers, and lakes, respectively. Each item may also have attributes that describe the items, such as the name or temperature.
     25
     26-- [http://en.wikipedia.org/wiki/Shapefile wikipedia]
    2327
    2428[http://www.census.gov/cgi-bin/geo/shapefiles/national-files Census] folks have recently released updated data.
     
    2832=== Addresses and Geo coding ===
    2933
    30 If you want to plot points on a map, you will need to provide the addresses. In addition, you will need to add geo-coding information to the addresses in order for the points on the map to be plotted. Geo-coding data is....
     34If you want to plot points on a map, you will need to provide the addresses. In addition, you will need to add geo-coding information to the addresses in order for the points on the map to be plotted. Geo-coding data is converting an address (building number, street name, zipcode) into latitude and longitude coordinates, that allow the location to be plotted on a map.
    3135
    3236http://geocoder.us/ - Geocoding site that lets you look up one address at a time. Their sourcecode is available, if one was interested in offering this service.
     
    3640=== RSS ===
    3741
    38 You will need to publish your geo-coded data in a way that your map front end can access it. RSS is one way to do that.
     42One handy way to make your data portable is to use RSS. It is one way to publish your geo-coded data in a way that your map front end can access it. [http://detentionwatchnetwork.org/dwnmap This map] uses the drupal content management system to publish an RSS feed of all the detention centers in the US. Openlayers reads that feed and uses it to print markers on a map.
    3943
    4044[http://georss.org/ GeoRSS] is simple proposal for RSS feeds to also be [http://www.georss.org/overview.html described by location]