Changes between Version 11 and Version 12 of mapping
- Timestamp:
- Jul 3, 2008, 2:59:04 PM (16 years ago)
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mapping
v11 v12 10 10 === The Map Server === 11 11 12 The Map Server's job is to read mapping data files and create maps from them (explain more...)12 The Map Server's job is to read mapping data files and create maps from them. 13 13 14 14 MFPL offers [http://mapserver.gis.umn.edu/ mapserver] for all members. Please [/newticket post a ticket] to request access to the map server. 15 15 16 To get started with our mapserver, you will need to ...16 To 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. 17 17 18 18 Other 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]. … … 20 20 === Data === 21 21 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.'' 22 The 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 24 Shapefiles 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] 23 27 24 28 [http://www.census.gov/cgi-bin/geo/shapefiles/national-files Census] folks have recently released updated data. … … 28 32 === Addresses and Geo coding === 29 33 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 ....34 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 converting an address (building number, street name, zipcode) into latitude and longitude coordinates, that allow the location to be plotted on a map. 31 35 32 36 http://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. … … 36 40 === RSS === 37 41 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.42 One 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. 39 43 40 44 [http://georss.org/ GeoRSS] is simple proposal for RSS feeds to also be [http://www.georss.org/overview.html described by location]
