similar to: favorite pattern for adding functionality to an AR?

Dear, I am trying to visualise a time-progressing line (it's supposed to represent spread patterns) using brew package and Google Earth. The idea is to have a function which takes start and end point geographic coordinates, as well as number of intervals to chop the path up, and returns the collection of points segmenting this line. Unfortunately my calculations fail for large distances,

Hello everybody, I''m working with Version 3 of Google Maps JavaScript API, and I have the next code: In a layout of my application: <script type="text/javascript" src="http://ajax.googleapis.com/ajax/ libs/jquery/1.4.1/jquery.min.js"></script> <script type="text/javascript" src="http://maps.google.com/maps/api/js?

Background: OS: Linux Mandrake 10.1 release: R 2.0.0 editor: GNU Emacs 21.3.2 front-end: ESS 5.2.3 --------------------------------- Colleagues Is there a function to calculate distances between adjacent latitude/ longitude pairs in a matrix? It is basically a spatial diff() function that I have in mind. Data: long1, lat1 long2, lat2 long3, lat3 looking for: diff(data$long, data$lat)

Dear R users, I need to find the coordinates for the point (midpoint) located half way between two pairs of coordinates (lon1,lat1 and lon2,lat2) assuming a straight line between them. What would be the best way? I tried to find an answer in the help archives but without success. I would greatly appreciate any help. df<- data.frame(lon1=c(-4.568,-4.3980), lat1=c(59.235,56.369),

All - I have a large data frame that looks like ID p1 p2 p3...p20 Lat1 Lat2 Lat3...Lat20 Long1 Long2 Long3...Long20 1 0 0 1 0 NA NA 29.xx NA NA NA -89.xx NA 2 1 0 0 1 27.xx NA NA 29.00 -88.00 NA NA -89.xx 3 0 0 0 0 NA

Author: duvander Date: Sun May 31 17:34:27 2009 New Revision: 12 Modified: trunk/source/mxn.cloudmade.core.js Log: Implemented most Cloudmade functions. Still requires image, tile and KML/GeoRSS overlays Modified: trunk/source/mxn.cloudmade.core.js ============================================================================== --- trunk/source/mxn.cloudmade.core.js (original) +++

Hi to all! Well, I''ve been trying to find a solution to route using known LatLng points - I already have the location position, all I needed was the actual route, so I''ve put together an addition to the "mapstraction-route.js". I''ve listed it below, so maybe it would not be a bad idea to merge it to the trunk... Also, I have a few other questions regarding

I am wondering if there is a function which will do a join between 2 data.frames by minimum distance, as it is done in ArcGIS for example. For people who are not familiar with ArcGIS here it is an explanation: Suppose you have a data.frame with x, y, coordinates called track, and a second data frame with different x, y coordinates and some other attributes called classif. The track data.frame has

Hi lily, It's not too hard to do it using dataframes. Getting the indexing right is usually that hardest part: # these values are the centers of the black cells lat<-rep(28:38,11) lon<-rep(98:108,each=11) pop<-sample(80:200,121) # just use the data.frame function blackcells<-data.frame(lat=lat,lon=lon,pop=pop) plot(0,type="n",xlim=c(97.5,108.5),ylim=c(27.5,38.5),

Hi Jim, Thanks. It works. I now have more complex problems. If at each blackcell, there are two variables such as pop and mood. For each variable, there are daily records in one year, so 365 records for pop and 365 records for mood. The averaged values for the redcells should be daily records too. What kind of format do you recommend for this problem? Right now, I just get the latitudes and

Daniel, muchas gracias por contestar y tan rápido. Pues puede ser la solución, he hecho el cambio y sigue sin pintarme los puntos -> data_ <- toJSONArray(data_, json = F) map$geoJson( # leafletR::toGeoJSON(data_, # # lat.lon = c('Lat', 'Long'), # dest=output_geofile), data_, onEachFeature =

Hello, I am trying to match lat/lon from one dataset with the lat/lon from a second dataset and use that rows data for calculations. I am using match, but this is finding the first match and not comparing the pair, how can I determine if the lat/lon are the same? See example below. Is there a better way to determine to a matching pair of lat/lon values? Example Datasets: > data2

Hi, I am not totally sure what caused this but I just wanted to know if anything of this sort has been seen in the ext3 world. I did a fresh install of redhat 7.2 linux with kernel-2.4.9(we have some patches applied to this). I have root and boot filesystems as ext3 type. After running some tests the system gets into a strange state. I cannot move one file to another if that destination file

Hi, I have a set of locations defined by longitude and latitude (in degrees), and want to calculate the spatial (or geographic) distance among all locations. I did not find such a function in the spatial-related packages. (I *cannot* use 'dist', as I have geographic, not cartesian coordinates). thanks! Robert Robert Ptacnik Norwegian Institute for Water Research (NIVA) Gaustadall?en 21

Hi, I am having trouble getting custom GIcons to display. Here is the code in my controller: @map = GMap.new("map_div") @map.control_init(:large_map => true,:map_type => true) @map.icon_global_init(GIcon.new(:image => "images/APBox-20.png "),"ap_none") infoString = "Friendly Name: "+result.friendly_name+

Hello generous coders, I''m having difficulty getting a couple of tests to pass. I have an address model which takes an address and with a callback on save and update passes the address to google''s geocoding service. The returned XML is parsed and saved to the address object: protected def geocode_address key = "mykey" url =

Hi, i''m trying to use the GeoKit plugin to calculate the distance between 2 points. So the idea is, i do a search for an article, and the results i want to order by distance. So i have a form where I enter the article (that im looking for) and my address. Then rails must find all articles that match with my query and order by address. So now, i have two models: Article and User. Articles

Hola, Ando un poco desesperado con los mapas interactivos de Rcharts <https://github.com/ramnathv/rCharts>+Leaflet. Estoy intentando pintar en un mapa las cámaras de tráfico de madrid, y las estaciones de calidad del aire, simplemente donde están, es decir, aun no estoy recogiendo los datos de medida. Proyecto -> https://github.com/ADIRSE/maddata He conseguido pintar ambos, con

Hi all, I use kriging to interpolate the precipitation from stations, but the map of this results show lots of stripes. (please see the attachment)I think there's something wrong with the setting of the dimension of this matrix, however, I have no idea how to know or test to see if this setting is correct or not.I've tried to switch the latitude and longitude, but still got the same

I have a dataset showing points, with a category for each point and its location. I simply want to display my points, in a way that users can toggle the points on and off by category. Where I have two objects in the same category I'd like to display them nudged to appear as two distinct, but very close points. I have made reproduceable example (the places are not real), which is loosely