geospatial

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . I want to get the lat/long for a browser. I know that HTML5 has the feature, but I want a full plugin that handles old browsers

问题 I am working with geokettle, geomondrian and spatialytics to show the results in map. When I reload the page of spatialytics (it is on server tomcat), the map doesn't appear(gets pink). I inspected element and I saw what is in image below: Click to see the image Anyone knows what can i do? Cumps. 来源： https://stackoverflow.com/questions/17374197/spatialytics-failed-to-load-resources-map

问题 we're using Solr in our service. Recently, we're working on upgrading Solr to Solr6 & spatial4j-v0.6. But we faced that geospatial data cannot be fed, it's rejected, that has syntax like Circle(lat, lon, d=d) . It seems the syntax is dropped from Solr, but is it really dropped? Since when and why?? I couldn't find official statement that they dropped this syntax. As for now, I find an option format=LEGACY for the fieldType , then Solr accepting data. But, are there any recommended, proper way

问题 Is it possible to draw a buffer (another feature) around a geographic feature in d3.js as a fixed distance unit (kilometers or miles)? For instance, how would I draw a path around a point that extends 25 miles from that point in every direction. I've tried using d3.geo.circle and passing a fraction of degree (25 miles / approximately 69 miles per latitudinal degree or 25 / 69) but realize that although d3.geo.circle handles the reprojection of degrees, it does not accommodate for the

问题 We are using a shapely library to check that some random point is not in some prohibited areas stored in a shape file. with fiona.open(path) as source: geometry = get_exclusive_item(source[0]) geom = shapely.geometry.shape(geometry['geometry']) def check(lat, lng): point = shapely.geometry.Point(lng, lat) return not geom.contains(point) But the latest call geom.contains(point) takes about a second to complete. Is there any other faster libraries for python, or could we optimize a shape files

问题 Alright, I have a question that I can't find an answer to elsewhere, so I hope you guys can help me. I want to render the area of former Yugoslavia, and I have a dataset for that. So far I have the following, which works fine: library(sp) library(maptools) greg <- readShapePoly("../GlobalData/GREG/GREG.shp", proj4string=CRS("+proj=longlat +ellps=WGS84")) yugo <- greg[greg$COW == 345,] plot(yugo) This gives me a map like this: But I actually only want the upper left part of the map: I have

问题 DECLARE @orig geography = geography::Point(17, 78, 4326); Select @orig.STDistance(geography::Point(17.001, 78.00001, 4326))/1000 gives 110.674385214845 function calculateDistance(lat1, lon1, lat2, lon2, units) { var R = 6371; // Radius of the earth in km var dLat = deg2rad(lat2 - lat1); // deg2rad below var dLon = deg2rad(lon2 - lon1); var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2); var c = 2 * Math

问题 I've made the same question elsewhere. Now I bring the data so you may try to reproduce the error. I just wanna see how much of a small area was deforested up to 1997. Small area is in setoresp.zip. Deforestation is in d97.zip. The files are here. Unzip them to the working directory, along with the code: # This script reads sectors of investigated cities and calculates the # deforestated area (up to 1997) for the first sector library(rgdal) library(rgeos) library(raster) setp <- readOGR(".",

问题 I have loaded the geospatial data from geonames.org into Marklogic using RDF import. When using the Query Console to explore the data, I see the data has been loaded into an xml document and looks like this: <sem:triple> <sem:subject>http://sws.geonames.org/2736540/</sem:subject> <sem:predicate>http://www.w3.org/2003/01/geo/wgs84_pos#lat</sem:predicate> <sem:object datatype="http://www.w3.org/2001/XMLSchema#string">40.41476</sem:object> </sem:triple> <sem:triple> <sem:subject>http://sws

问题 I found the solution for this question in C#, but I can't translate it to a single query T-SQL, since my C# implementation requires branching (if then else). I also found the following C# solution, which could be translated to a single query T-SQL but it doesn't produce the correct results public static double GetAzimuth(WGSCoord c1, WGSCoord c2) { var lat1 = DegToRad(c1.Latitude); var lon1 = DegToRad(c1.Longitude); var lat2 = DegToRad(c2.Latitude); var lon2 = DegToRad(c2.Longitude); return