geocoding

I am trying to plot some information that shows full population and then a subset of that population by location on a map. I've seen data visualizations that use concentric circles or 3-d inverted cones to convey this. I just can't figure out how to do it in ggplot / ggmap Here's a free hand version in Paint that shows a rough idea of what I'm looking to do: Here's a rough piece of data for an example: > dput(df1) structure(list(zip = c("00210", "00653", "00952", "02571", "04211", "05286", "06478", "07839", "10090", "11559"), city = c("Portsmouth", "Guanica", "Sabana Seca", "Wareham", "Auburn"

I want to create an overlay on top of Google Maps that displays different streets in different colors. In the Google Maps API it is possible to create markers and polygons that cover certain areas. Is there a way to somehow mark different streets? RedBlueThing It sounds to me like you are interested in showing some application specific coloring for your Google maps display (rather than traffic maps). If so , then you should check out custom overlays. You can create your own transparent background overlay tiles (with your colored streets), match them up with the Google maps tiles and then

What is the most complete, precise and reliable way to get the coordinates (latitude / longitude) of a given ZIP / Postal Code of a given country? I need to make a lot of requests, so a high API limit rate (maybe even absent) would be useful. GeoNames dumps would be cool, but it seems to have way too many duplicate coordinates ( example ) and it also seems that their database is missing some ZIP / postal codes for specific countries. Are there any other (reliable) alternatives? While I was reading a Meta question , I came across this link: http://query.yahooapis.com/v1/public/yql?q=select%20

I need to model a postal address that can have multiline street address, the city, the state (province), and the postal code. the country is omitted. I need to preserve line breaks in the street addresses but still be able to search the addresses. I see two ways to do it: class Address(models.Model): street = models.ForeignKey('StreetAddress') city = models.TextField() province = models.TextField() code = models.TextField()<br> class StreetAddress(models.Model): line_number = models.IntegerField() text = models.TextField() or this one which stores the street address in a single text field but

I recently posted a question regarding plotting postions on cities in europe as points on a map. See R, get longitude/latitude data for cities and add it to my dataframe cities xlsx file contains about 20000 cities in europe. I got an error message when trying to find the latitude/longitude data using geocode. I have inserted part of the code below: cities <- read.xlsx("EU_city.xlsx",1) # get frequencies freq <- as.data.frame(table(cities)) library(plotrix) freq$Freq <- rescale(freq$Freq, c(1,10)) # c(scale_min, scale_max) # get cities latitude/longitude - kindly provided by google: library

I'm trying to find a webservice that will allow me to get a County name (not Country) for a specific Lat/Long. I would be performing the lookup within a server application (likely a Java application). It doesn't have a be a webservice if there is some library out there I suppose, but I would like up-to-date information. I have looked around quite a bit for an API that supports this, but so far I haven't been able to find one that works. I have tried the Yahoo APIs like so: http://where.yahooapis.com/geocode?q=39.76144296429947,%20-104.8011589050293 But it doesn't populate the address