latitude-longitude

问题 Let's say I have a data set with the date, latitude, and longitude. dt = data.table(date = c("2017-10-24 05:01:05", "2017-10-24 05:01:57", "2017-10-24 05:02:54"), lat = c(-6.2704925537109375, -6.2704925537109375, -6.2704925537109375), long = c(106.5803680419922, 106.5803680419922, 106.5803680419922)) The time is UTC. Is it possible to transfer that UTC to the local time using the lat and long? 回答1: I found a good answer on converting longitude and latitude to timezones here, so here is how we

问题 I've done my best to read up on this, and I think I've found the process that fits best, but if anyone else has any ideas or any functions or different methods for this it would be much appreciated. So I have a list of small data frames of different row lengths with each data frame containing several latitude and longitude coordinates in separate columns. For each item on the list separately, I need to remove a coordinate pair that may be an outlier and then find the mean center of the

问题 I have two data sets, A and B, which give locations of different points in the UK as such: A = data.frame(reference = c(C, D, E), latitude = c(55.32043, 55.59062, 55.60859), longitude = c(-2.3954998, -2.0650243, -2.0650542)) B = data.frame(reference = c(C, D, E), latitude = c(55.15858, 55.60859, 55.59062), longitude = c(-2.4252843, -2.0650542, -2.0650243)) A has 400 rows and B has 1800 rows. For all the rows in A, I would like to find the shortest distance in kilometers between a point in A

问题 I am creating a portal using MySQL, JavaScript and Ajax and I want to fetch user's location in terms of latitude and longitude. if it is not possible to fetch the location without asking then once user grant the permission, I could fetch the location from any page without asking ever again. Thanks in Advance. 回答1: 3 ways to do this in this answer: Get a GPS precise location asking the user to allow access to its browser's API Get an approximate location (country, city, area) using an external

问题 I am creating a portal using MySQL, JavaScript and Ajax and I want to fetch user's location in terms of latitude and longitude. if it is not possible to fetch the location without asking then once user grant the permission, I could fetch the location from any page without asking ever again. Thanks in Advance. 回答1: 3 ways to do this in this answer: Get a GPS precise location asking the user to allow access to its browser's API Get an approximate location (country, city, area) using an external

问题 This question already has answers here : Convert lat/lon to zipcode / neighborhood name (5 answers) Closed 5 years ago . I have a data.frame with 1500 latitude/longitude entries. I need to map these coordinates to their zip codes. Is there a way to do this besides entering them in one at a time to a geonames -type api? I would like a package in R that takes in a lat-lon combo and produces a zip code for every row of my data.frame. 回答1: Using the Open Streetmap API, you could try library(RCurl

问题 This question already has answers here : Convert lat/lon to zipcode / neighborhood name (5 answers) Closed 5 years ago . I have a data.frame with 1500 latitude/longitude entries. I need to map these coordinates to their zip codes. Is there a way to do this besides entering them in one at a time to a geonames -type api? I would like a package in R that takes in a lat-lon combo and produces a zip code for every row of my data.frame. 回答1: Using the Open Streetmap API, you could try library(RCurl

来源： https://stackoverflow.com/questions/39072102/how-to-find-utm-zone-using-current-latitude-and-longitude-in-android

来源： https://stackoverflow.com/questions/41036933/universal-logic-for-finding-qibla-direction

来源： https://stackoverflow.com/questions/41036933/universal-logic-for-finding-qibla-direction