geolocation

问题 I'll first introduce the problem: I'm developing an application where I've to show a map field, and overlay markers and lines. However, in BlacBerry OS 5.0, the only MapField available in the API does not provide means to overlay stuff, only show the map at a location. It also provides methods to transform screen coordinates (pixels) to/from WGS84 coordinates. These methods might be computationally expensive. So to paint my own items, I need to extend this class and override its paint()

问题 I'll first introduce the problem: I'm developing an application where I've to show a map field, and overlay markers and lines. However, in BlacBerry OS 5.0, the only MapField available in the API does not provide means to overlay stuff, only show the map at a location. It also provides methods to transform screen coordinates (pixels) to/from WGS84 coordinates. These methods might be computationally expensive. So to paint my own items, I need to extend this class and override its paint()

问题 I'll first introduce the problem: I'm developing an application where I've to show a map field, and overlay markers and lines. However, in BlacBerry OS 5.0, the only MapField available in the API does not provide means to overlay stuff, only show the map at a location. It also provides methods to transform screen coordinates (pixels) to/from WGS84 coordinates. These methods might be computationally expensive. So to paint my own items, I need to extend this class and override its paint()

问题 I'll first introduce the problem: I'm developing an application where I've to show a map field, and overlay markers and lines. However, in BlacBerry OS 5.0, the only MapField available in the API does not provide means to overlay stuff, only show the map at a location. It also provides methods to transform screen coordinates (pixels) to/from WGS84 coordinates. These methods might be computationally expensive. So to paint my own items, I need to extend this class and override its paint()

问题 I am new at spatial analysis, but I cant find this answer anywhere. I have a list of post codes in CRS coordinates, latitude and longitude, and London's Boroughs shape file in OSN coordinates, and I would like to map them together, but this is what happens. This is the head of the postcodes london_post_codes.head() Out[81]: postcode latitude longitude 0 WD6 1GS 51.658021 -0.255663 1 WD17 1LA 51.660366 -0.397525 2 WC2N 6LE 51.509413 -0.121676 3 WC2N 6NA 51.508363 -0.124454 4 WC2N 6ND 51.508216

问题 I am new at spatial analysis, but I cant find this answer anywhere. I have a list of post codes in CRS coordinates, latitude and longitude, and London's Boroughs shape file in OSN coordinates, and I would like to map them together, but this is what happens. This is the head of the postcodes london_post_codes.head() Out[81]: postcode latitude longitude 0 WD6 1GS 51.658021 -0.255663 1 WD17 1LA 51.660366 -0.397525 2 WC2N 6LE 51.509413 -0.121676 3 WC2N 6NA 51.508363 -0.124454 4 WC2N 6ND 51.508216

问题 I want to retrieve Geo address from given latitude and longitude using geocoding, using the given example on the site http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true I just need city name New York in this example and country name i.e United States. But the problem is there are more than one appearances of these words as long_name. My question how can I parse this json/xml in php to get just city name and country. $url= file_get_contents('http://maps

问题 I want to retrieve Geo address from given latitude and longitude using geocoding, using the given example on the site http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true I just need city name New York in this example and country name i.e United States. But the problem is there are more than one appearances of these words as long_name. My question how can I parse this json/xml in php to get just city name and country. $url= file_get_contents('http://maps

问题 I am developing a mobile based web-site, there I have integrated Google Maps, I need to fill the 'From' field of Google Maps dynamically. Is it possible to get the GPS location from web browser and fill it up in the 'From' field of a Google Map dynamically? 回答1: If you use the Geolocation API, it would be as simple as using the following code. navigator.geolocation.getCurrentPosition(function(location) { console.log(location.coords.latitude); console.log(location.coords.longitude); console

问题 I've downloaded the City database from MaxMind found here: http://geolite.maxmind.com/download/geoip/database/GeoLite2-City-CSV.zip which contains no latitude/longitude information. that information seems be in a different file: http://geolite.maxmind.com/download/geoip/database/GeoLiteCity_CSV/GeoLiteCity-latest.zip however, when attempting to correlate the two I find that the subdivision codes do not match. for example the first file contains the line: geoname_id,locale_code,continent_code