Re: [R-sig-Geo] Getting started with Open Source GIS
Ezra, this post on the GRASS-Announce list may be of interest for you too: http://n2.nabble.com/Arramagong-GISVM-GeoSpatial-Live-DVD-and-Virtual-Machine-available-td3834441.html regards, Tom ___ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Re: [R-sig-Geo] Getting started with Open Source GIS
Dear Ezra! Additionally to the already mentioned things, you can have a look at SAGA GIS for some geospatial operations. For geocoding purposes tom hengl used google maps. Here you can see his example: http://spatial-analyst.net/wiki/index.php?title=Mapping_research_hot-spots hope it helps! marco helbich -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! ___ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Re: [R-sig-Geo] Getting started with Open Source GIS
On Sat, Oct 17, 2009 at 8:13 AM, Barry Rowlingson wrote: > On Sat, Oct 17, 2009 at 3:46 PM, Ezra Boyd wrote: > >> Will I be able to complete the tasks described above using the the Open >> Source GIS without a bunch of time consuming complications? Or, should I >> fork over some cash to extend my Arcview license? > > What's Arcview going to get you? You will be able to do all your > statistics in R - get a copy of Applied Spatial Data Analysis in R, > which will tell you the basics and more about manipulating spatial > data in R. Remember that statistics is never plug and play - even if > there's statistics functions in Arcview, you still need to check > diagnostics and other assumptions before your conclusion is valid. I > don't think Arcview or other ESRI products will give you that > flexibility. > > Once your stats are done and checked and you want to make pretty > maps, then you can create shapefiles from R and load them into Qgis > for mapping with any other layers of information you want to put in. > It is even possible to make publication-quality maps in R using the sp > package and friends (as in the ASDAR book). Good points so far, but I wouldn't be that quick to relegate GRASS to obscure C-based tasks. I find the the combination of GRASS+R is an efficient setup, as the two packages are very much complimentary. Also, you are going to need GRASS if you would like to work with data sets that won't fit into memory. Cheers, Dylan > I wouldn't worry about GRASS - it's great for hardcore spatial > analysis (buffer this, overlay with that, compute watersheds, clip to > river buffers, count population in areas,...) but if you need to go > outside the boxes given you're going to have to start writing in C... > It's nice to know the power of GRASS is there, but I try and avoid > using it! > > Barry > > ___ > R-sig-Geo mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > ___ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Re: [R-sig-Geo] Getting started with Open Source GIS
On Sat, Oct 17, 2009 at 3:46 PM, Ezra Boyd wrote: > Will I be able to complete the tasks described above using the the Open > Source GIS without a bunch of time consuming complications? Or, should I > fork over some cash to extend my Arcview license? What's Arcview going to get you? You will be able to do all your statistics in R - get a copy of Applied Spatial Data Analysis in R, which will tell you the basics and more about manipulating spatial data in R. Remember that statistics is never plug and play - even if there's statistics functions in Arcview, you still need to check diagnostics and other assumptions before your conclusion is valid. I don't think Arcview or other ESRI products will give you that flexibility. Once your stats are done and checked and you want to make pretty maps, then you can create shapefiles from R and load them into Qgis for mapping with any other layers of information you want to put in. It is even possible to make publication-quality maps in R using the sp package and friends (as in the ASDAR book). I wouldn't worry about GRASS - it's great for hardcore spatial analysis (buffer this, overlay with that, compute watersheds, clip to river buffers, count population in areas,...) but if you need to go outside the boxes given you're going to have to start writing in C... It's nice to know the power of GRASS is there, but I try and avoid using it! Barry ___ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
[R-sig-Geo] Getting started with Open Source GIS
Hi Group, I'm a new user to the Open Source GIS community and I am writing now to see if I will be able to complete my research tasks using the Open Source software. I am writing my dissertation on modelling the health outcomes of a disaster event. For my event, I have a outcome incidence count that is a list of addresses for each case. I need to geocode to create a point layer. I also a population denominator that is a polygon file that I need to manipulate to account for population dynamics. From these, I will calculate the rate of the outcome for the polygons, and this rate will be my dependant variable. For my independent variables I have one set of layers that are in raster format, and another set that are polygons. I need to aggregate these data sources to the above describe polygon layer for my dependent variable and then find an appropriate spatial regression method. My Arcview demonstration license expired last week, so I gotta figure out if I can to do these steps with the open source software during the short time that I have available (a few weeks.) I have some experience with R and QGIS, and have found the basic tasks to be fairly straightforward. I have GRASS installed, but haven't figured out how to get started with it. Will I be able to complete the tasks described above using the the Open Source GIS without a bunch of time consuming complications? Or, should I fork over some cash to extend my Arcview license? Thank you for your time and consideration. Ezra Boyd PhD Candidate LSU Dept. of Geography and Anthropology [[alternative HTML version deleted]] ___ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
