Re: [R-sig-Geo] Creating random (but believable) geographies

2009-12-28 Thread Roger Bivand
On Mon, 28 Dec 2009, Barry Rowlingson wrote: On Mon, Dec 28, 2009 at 11:20 AM, Jim Lemon wrote: Hi Barry, The first thing I thought of was to specify nodes (intersections of borders = vertices of polygons) and then wiggle the lines between the nodes using something like this: wigglyLine<-fu

Re: [R-sig-Geo] re. Creating random (but believable) geographies

2009-12-28 Thread Barry Rowlingson
On Mon, Dec 28, 2009 at 12:33 PM, Darren Norris wrote: > using names of disease vectors to generate prefix/suffixes (mosquito, > nematode .)? Can then use family, genus, species etc already nicely > arranged into different strata? I just tried using emacs' 'dissociated press' function to c

Re: [R-sig-Geo] re. Creating random (but believable) geographies

2009-12-28 Thread Darren Norris
...snip That's an idea, but someone *might* recognise their state boundaries, even shifted into the Atlantic and maybe even rotated and given a silly name. I just like the idea of creating totally fictitious regions! That's another interesting problem - creating fake names for regions. I sup

Re: [R-sig-Geo] re. Creating random (but believable) geographies

2009-12-28 Thread Barry Rowlingson
On Mon, Dec 28, 2009 at 12:11 PM, Darren Norris wrote: > how about simply using what already exists? > For example, > Brazil [data freely available (but may need to cite the source which may > defeat what you are trying to achieve?) at: > ftp://geoftp.ibge.gov.br/mapas/malhas_digitais/municipio_20

[R-sig-Geo] re. Creating random (but believable) geographies

2009-12-28 Thread Darren Norris
how about simply using what already exists? For example, Brazil [data freely available (but may need to cite the source which may defeat what you are trying to achieve?) at: ftp://geoftp.ibge.gov.br/mapas/malhas_digitais/municipio_2005/E500/Proj_Geografica/ArcView_shp/ ] has three sub-administ

Re: [R-sig-Geo] Creating random (but believable) geographies

2009-12-28 Thread Jim Lemon
On 12/28/2009 09:33 PM, Barry Rowlingson wrote: I've recently been working on a web site for tropical disease mapping in Africa. As a demo, I'm not using real data, but I have been using real countries. I don't really want to use real countries just in case there's any misunderstanding that this

Re: [R-sig-Geo] Creating random (but believable) geographies

2009-12-28 Thread Barry Rowlingson
On Mon, Dec 28, 2009 at 11:20 AM, Jim Lemon wrote: > > Hi Barry, > The first thing I thought of was to specify nodes (intersections of borders > = vertices of polygons) and then wiggle the lines between the nodes using > something like this: > > wigglyLine<-function(xstart,ystart,xend,yend,nseg=2

[R-sig-Geo] Creating random (but believable) geographies

2009-12-28 Thread Barry Rowlingson
I've recently been working on a web site for tropical disease mapping in Africa. As a demo, I'm not using real data, but I have been using real countries. I don't really want to use real countries just in case there's any misunderstanding that this is simulated case numbers. So I've thought about

[R-sig-Geo] GEOSTAT 2010 Summer School, 27 June - 4 July 2010; University of Plasencia, Spain

2009-12-28 Thread Tomislav Hengl
GEOSTAT 2010 Summer School 27 June - 4 July 2010; University of Plasencia, Spain This is the first call for participation in the GEOSTAT 2010 Summer School. GEOSTAT focuses on important aspects of statistical analysis of spatial and spatio-temporal data using open source / free GIS tools: R, SAG