The volcano locations used in this post are available here. Check out the GMT documentation for more details and be sure to see the previous blog posts on creating a simple globe and creating an annotated map. With psxy you can also draw line and polygons. Notice that we redirect the output using > to append to our world_volcanoes.eps file. With no parameters it will use those specified in our pscoast command -Sc0.15c Set the symbol to a circle (c) with a size of 0.15 cm -G255/0/0 Set the color for the symbol to RGB 255,0,0 (red) -O The important argument-overlay on the previous map No additional parameters are required -R The region of interest. The arguments are: volcano_xy.txt The name of the text file containing the locations -JN The map projection (Robinson). Psxy volcano_xy.txt -JN -O -R -Sc0.15c -G255/0/0 > world_volcanoes.eps To create the overlay, we use the psxy command: The file doesn’t contain any attribute information about the volcanoes, just the location. The file format is simply longitude, latitude: For this we use a text file containing the locations of the volcanoes. Now that we have the base map command complete (don’t forget the -K) we can add our overlay. If we were to run pscoast without -K it would give us a nice base map: The -K allows us to create an overlay by issuing additional commands. Title the map “World Volcanoes” –PAPER_MEDIA=archA Set the paper size to archA -K More PostScript code will be appended later ”World Volcanoes”: Place annotation at 60 degree intervals on grid lines 10 degrees apart. land) with RGB color 220,220,220 -S0/192/255 Fill wet areas with RGB color 0,192,255 -N1 Draw national political boundaries -B60g10. The map will be 26 cm wide -R-180/180/-90/90 The region of interest is set to the entire globe -W Draw coastlines -G220/220/220 Fill the dry areas (i.e. JN0/26 Use the Robinson projection centered at 0 degrees longitude. (Many of these parameters are discussed in greater detail in the previous GMT posts-see links above.). Here is a brief summary of the arguments used to create the base map: "World Volcanoes": -PAPER_MEDIA=archA -K > world_volcanoes.eps The first step is to create the base map using pscoast: In this example we will create a base map and then use the overlay feature of GMT to plot the location of volcanoes throughout the world. (we could start a 'spatially enabled' mailing list.In our previous GMT examples we used a single command to create a simple globe and create an annotated map. User-friendly Desktop Internet GIS (uDig) is an open source spatial data. "maps" variable with all info, defn, overlays, + external call For example, using an aerial photograph as a. any module that wants a map, could make call to this module original concept: display a map in a node tracking news posts and pictures on logging or entl adding spatial locations to nodes or other information for some clients/problems, you may want to store the data in Right now ok to have goegraphic information in node module Do we need to store data in OGC specific formats? To the PostgreSQL object-relational database." "PostGIS adds support for geographic objects Specification of the Open Geospatial Consortium (OGC). "MySQL implements spatial extensions following the * assumption that using WGS84 (same as GPS system) open source geocoding / data processing tools Layer Group link Click the Add new layer group link. Locate the Layer Group link and click it. BC Government (Integrated Land Management Bureau) Creating a Base Map with a Layer Group The best way to easily set-up a map with more than one layer for consumption is to create a Layer Group, that is what we are going to do in this section. better yet, free but someone else is custodian and server! Planet Geospatial is maintained by James Fee Weblogs and hence this aggregation are those of the original authors. Planet Geospatial is an aggregation of public weblogs written by Bringing it all together in Drupal: work to date Location: IP-based Location InformationĦ. We should really use a Wiki tool for this organic document/book. We hope they will find the early sections useful. In the QuickMapServices Settings window, go to the More Services tab > Click Get Contributed Pack to get more basemaps. Others may be interested in getting their own base map data and even serving it. They will find Sections 5 and 6 most interesting. How to use this document? Some people may only want to to add spatial tags to their nodes (and use canned mapping sources like Google Maps). Charles and Dan put this together after the 2006 Vancouver OSCMS. The following is an outline of a background document on creating spatially enabled content with a CMS.
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