geolocation

问题 I was using the following code to get my current location. But the longitude and latitude generated was not at all accurate. It was showing a location about 700 Kms away from my location. How can I make it accurate? <script> var x = document.getElementById("demo"); function getLocation() { if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(showPosition); } else { x.innerHTML = "Geolocation is not supported by this browser."; } } function showPosition(position) { x.innerHTML

问题 I'm trying to selection objects within a region from a pandas dataframe which contains a list of item ids and lat lon pairs. Is there a selection method for this? I think this would be similar to this SO question but using PANDAS instead of SQL Selecting geographical points within area Here is my table saved in locations.csv ID, LAT, LON 001,35.00,-75.00 002,35.01,-80.00 ... 999,25.76,-64.00 I can load the dataframe, and select a rectangular region: import pandas as pd df = pd.read_csv(

问题 I'm trying to selection objects within a region from a pandas dataframe which contains a list of item ids and lat lon pairs. Is there a selection method for this? I think this would be similar to this SO question but using PANDAS instead of SQL Selecting geographical points within area Here is my table saved in locations.csv ID, LAT, LON 001,35.00,-75.00 002,35.01,-80.00 ... 999,25.76,-64.00 I can load the dataframe, and select a rectangular region: import pandas as pd df = pd.read_csv(

问题 I'm making AR Mobile Web App, and my current goal is to show some events on the camera screen. For example, if there is fire in direction north from me, I want to point phone to north, and fire logo should be visible there. My problem is - how can I get the absolute compass data? I've tried this JavaScript code: function compassHeading(alpha, beta, gamma) { var dataContainerMotion = document.getElementById('dataContainerMotion'); // Convert degrees to radians var alphaRad = alpha * (Math.PI /

问题 I'm trying to plot a large number of latitude longitude values from a CSV file on a map, having this format (first column and second column): I'm using python 3.6 (apparently some libraries like Basemap doesn't operate on this version). How can I do that? 回答1: If you are just looking at plotting the point data as a scatterplot, is as simple as import matplotlib.pyplot as plt plt.scatter(x=df['Longitude'], y=df['Latitude']) plt.show() If you want to plot the points on the map, it's getting

问题 If I have a map image where: The latitude and longitude of the upper left corner (x=0, y=0) are known The width and height of the image is known Zoom (z-axis) is known. Can we compute the latitude and longitude for other coordinates in the image? For example, in the following image if I want to compute the lat/lon values for the white ploygon (where the coordinates (x,y) are known) 回答1: So given the information and the shape of the image, (see previous question): import numpy as np top_left =

问题 This question is different from regular mysql lat/long, radius based data fetching I want to search a mysql database table which contains following columns for example- ID Items lat long serving_radius(in km) 1 Item1 26.120888 85.364723 2 2 Item2 26.120888 85.364723 5 3 Item3 25.859800 85.786598 4 4 Item4 26.594900 85.504799 8 Now if a user has lat/long (29.941095/77.812424) wants to know which of these items can be served at his location. Then how i will fetch the result using php & mysql.

问题 I am trying to enable catalogue mode for a WooCommerce shop for users located everywhere but Australia. The store has 2 types of products simple variable I have tried "Turn Woocommerce shop into catalog for geolocated countries?" answer code, and it works well for "simple" products The issue is that variable products still show the quantity field and add to cart button although they are not purchasable. My understanding is that catalogue mode is essentially making products non purchasable. If

问题 I have a list of locations I retrieve and display in a Listview Builder. Each location has a latitude and longitude value. Am now trying to include a "distance" field to the Listview using the GeoLocator Plugin (https://pub.dartlang.org/packages/geolocator) - by having a "Find Nearest" button that gets the user location, then calculates the distance using the user's lat/lon and each location's lat/lon. Since the "GeoLocator Calculate Distance Method" is asynchronous, I can't insert Geolocator

问题 I have this code to use html5 geolocation this.getCurrentLocation = function(callback) { if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(function (pos) { callback({ 'lat' : pos.coords.latitude, 'lng' : pos.coords.longitude }); }, function (error) { switch(error.code) { case error.PERMISSION_DENIED: alert("Could not get your location. User denied the request for Geolocation."); break; case error.POSITION_UNAVAILABLE: alert("Could not get your location. Location