Questions tagged [latitude-longitude]
Angular geographic coordinates that specifying the north-south and east-west positions of locations.
2
votes
2answers
408 views
Getting longitude/latitude coordinates from Addresses?
I got a CSV file with more than 15000 address, and I need to show them on a map of the South-West of France.
I've found the MMQGIS plugin on QGIS, but it does so without the right SCR.
Do you have ...
1
vote
1answer
26 views
How to get latitude and longitude for a matrix data using specific projection in R?
I have matrix of temperature data and I would like to get lat and long for this data set in a particular projection
e.g.
PROJCS["DHDN_3_Degree_Gauss_Zone_3",GEOGCS["GCS_Deutsches_Hauptdreiecksnetz",...
1
vote
1answer
38 views
Displaying two separate Excel files on same map? [closed]
I have started to learn ArcMap.
I have two separate Excel files which are:
Border coordinates,
CSD coordinates.
For each Excel files, I have information for longtitude and latitude.
My aim is to see ...
0
votes
2answers
45 views
Calculation between Raw GPS data to latitude,longitude points?
I am working on the GPS related project. The objective is to understand the calculation process of the raw GPS data (server side calculation). It means " How did we get the latitude and the longitude ...
3
votes
1answer
77 views
Convert X, Y into Latitude,Longitude with unknown system
I have a set of X, Y values that indicate some locations in Hong Kong. But I am not able to convert the X/Y into latitude/longitude since the coordinate system is unknown. Is there any way I can fit ...
-2
votes
0answers
28 views
Need to fetch later info for latitude/longitude [duplicate]
I have a list of latitude and longitude addresses corresponding to address locations and a shapefile corresponding to the area. I need a way to identify the shape information visionary to each of the ...
10
votes
5answers
1k views
Calculating correct longitude when it's over |180|?
I'm trying to develop a "formula" to correct the lat-lng values.
I'm using vue-leaflet but when you pan outside the "first" world you get big numbers. Over +180 or under -180.
For example: when I ...
1
vote
2answers
88 views
How to buffer a pair of longitude and latitude coordinates in R?
I have a pair of longitude and latitude coordinates, and I want to plot a 500 meter buffer around it using leaflet or mapview. st_buffer, however, does not correctly buffer longitude/latitude data.
...
0
votes
0answers
32 views
How to find longitude and latitudes from easting and northing? [duplicate]
I am using QGIS V3.2. I am working on a project which requires me to plot anchor marks on the seabed. I have the data which is can plot into Excel and save as a CSV or text delimited file and upload ...
2
votes
1answer
57 views
Extracting Longitude and Latitude from shapefile?
I am working with a shapefile which can be found here. I am doing some data visualisation and want to see if certain longitude and latitudes are within a certain polygon in the shapefile.
This is the ...
2
votes
1answer
47 views
Mysterious Lat Long conversion to XY problem using QGIS
I am trying to import a CSV file with Lat Long values I geocoded in Google Earth into QGIS, and I'm getting some very strange results.
A well-formatted decimal-degree Lat/Long pair (like 30.402716, -...
2
votes
1answer
22 views
Area between two longitudes? [closed]
I am trying to compute the area between two longitudes (using the angle between them) but am having a hard time. I can do that more easily between latitudes but longitude reveals to be tricky.
Anyone ...
2
votes
1answer
47 views
Setting up lat/long graticule with 1 min output in QGIS?
I would like to set up a lat/long graticule in QGIS with output being a line shapefile with values in Degrees and Minutes, and grid lines shown at every even 1 minute (e.g. 13°23' W, 13°24' W, 13°25' ...
0
votes
1answer
31 views
Find all regions (lat, long, radius) that contain a point
A Region has a latitude, longitude (GEOMETRY('POINT')) and a radius.
Using postgis, how can I query all Regions where the distance from pointParam and region.point is less than or equal to region....
2
votes
1answer
33 views
Extract values from multiple rasters using lat / long and save as one CSV file
I would like to extract values from multiple rasters with a single lat / long or Shapefile. I have tried every tutorial and stackoverflow post and am getting nowhere. Maybe someone could please help. ...
0
votes
1answer
38 views
Calculate row and column for WMTS request from Lat/Long
I'm writing a request to a WMTS server that has an upper left corner at 90, -180 and spans the whole Earth. I want to get a tile containing some point (targetLat, targetLong).
Suppose we have some ...
1
vote
0answers
30 views
Getting coordinates ASCII file? [closed]
I want latitude longitude information as an ASCII file for a location of my choice in 1 km resolution. The picture shows data for each grid point. Now I want the lat long info for each grid, also as ...
1
vote
2answers
94 views
Reverse Geocoding in QGIS
I have a point shapefile with Latitude and Longitude attributes with more than 1000 features. I want to add street address data in the shapefile by Reverse Geocoding but the Geocoding plugin has no ...
0
votes
1answer
70 views
Listing all exact Degrees, Minutes, Seconds for an entire area
Does a database or dataset exist that lists all exact Degrees, Minutes, and Seconds (rounded to nearest decimal) for the continent of South America? What I am seeking is a list of DMS's that covers ...
2
votes
1answer
35 views
Does longitude/latitude info come directly from GNSS chip on Android devices?
I'm trying to directly communicate with the GNSS chip on my device and I am not clear whether the RAW GNSS information is coming directly from the GNSS chip or not. I have used the application ...
1
vote
0answers
52 views
Coordinates to Lat/Long Conversion
I'm trying to convert a GeoJSON Coordinates Point to latitude and longitude format, but I don't know exactly which is the format they have or which is the coordinate system they are expressed in.
I ...
0
votes
1answer
91 views
Mercator map coordinates transformation formula
I have a third-party application with a city map of size 131072x131072.
There are data on this map which contains x and y coordinates. I want to transform these coordinates to latitude and ...
1
vote
1answer
76 views
Differences in angle measurements in Web Mercator
I am trying to measure different angles on 2D map using lat/lon coordinates taken from Google Maps, and Java library JTS.
I have noticed a weird thing: my measurements are always distorted, except ...
1
vote
1answer
22 views
Using “Difference” geoprocessing tool on Big Data taking a very long time
I am using QGIS Bonn 3.2.3.
I've recently been using the Difference function to calculate a list of points and it is taking a terribly long time. I was wondering if you could point out any obvious ...
4
votes
3answers
67 views
Draw Bounds with coordinates in QGIS from CSV
I have a CSV file that contains 4 coordinates on each line, 1 min latitude, 1 max latitude, 1 min longitude and 1 max longitude. These 4 points delimit a particular region(they are the bounds) I would ...
0
votes
0answers
46 views
How do other cultures format latitudes and longitudes?
I'm writing a piece of software that needs to format lat/long information in multiple languages. I'd like to know how they are formatted in different cultures.
Does everyone use degrees?
How ...
0
votes
1answer
53 views
Using latitude,longitude of point and distance in degree to get another point?
Suppose I have latitude and longitude of a point and a distance in degree, how can I get to the other point? (Suppose the point to find is aligned horizontally or vertically)
0
votes
0answers
29 views
Calculating turn rate in GPS track data? [duplicate]
I have GPS track data and for each point have a latitude, longitude, and a timestamp. In most cases, the time between points is just a few seconds but it varies. I've flagged some of the GPS points ...
4
votes
3answers
531 views
Defining Latitude and Longitude before defining Datum?
Reference material:
The Five Key Ingredients for Mapping the Earth
There are five important steps to producing a map of the Earth's Surface. These are:
sphere with north and south through the ...
2
votes
2answers
145 views
R shapefile transform longitude latitude coordinates
I want to find out the coordinates (latitude and longitude) of Texas precincts. I download the shapefile from here.
I am using R to read the file and extract the coordinates:
dsn.tx <- "~/.../...
2
votes
0answers
94 views
ArcPy approach to add lat/long to CSV for multiple sets in one row [closed]
I have a CSV where each row contains 3 sets of coordinates in EPSG 32611 (UTM). I'd like to add columns that contain the coordinates in lat/long (EPSG 4326) also. So, columns H&I would be cols. B&...
1
vote
1answer
295 views
Latitude, longitude, projections, CRS
I'm confused about the following basic points:
Do lat/long points have a projection or are they projection agnostic?
Do these points live in a sphere or a plane?
I understand that projections are ...
1
vote
0answers
54 views
Converting latitude/longitude to full range referential
I have a list of latitudes and longitudes expressed as follow:
-1 <= latitude <= 0
0 <= longitude <= 1
Those coordinates represent POIs on a fantasy map displayed using the Leaflet ...
0
votes
0answers
68 views
Best geographic coordinate system to convert continental US lat lng to x,y using PyProj?
I have a list of lat, long coordinate pairs (all within the continental US).
I am looking to use PyProj to convert them from lat, long to x, y coordinates.
Looking at this example, I see a working ...
0
votes
0answers
57 views
Dimensions of images given their latitude and longitude for Google Earth Engine
From the point
long: 16.499050771335575, lat: -30.882
I want to find the corresponding latitude and longitude values that would result in a 200 km by 200 km square in which the aforementioned ...
1
vote
1answer
57 views
Placing Excel Data in ArcMap/ArcScene similar to Image Georeferencing
I have XYZ-dataset of Temperature Data in Excel, with no (Lat, Lon) added.
Every time when I try to display the Data in ArcScene the Programm tells me, that a Spacial Reference is missing (of course)....
0
votes
1answer
53 views
Choosing map projection by territory like ArcMap (but without ArcMap) [closed]
When I worked with ArcMap, I had no problem with choosing projection
ArcMap has a large number of predefined projections organized by world, continent, and country. You can navigate quickly to ...
0
votes
1answer
309 views
Python code for transforming lat long into FIPS codes?
I am trying to transform CSV files of lat long into FIPS codes. Does any one have a Python code that is able to do this? I have that worked then stopped working giving me an 'http 400 bad request' ...
0
votes
0answers
24 views
Shift in polygons due to precision loss
I am experiencing some shifting polygon that I obtain via pixel to lat lon conversion. I have a program to do image processing in opencv that uses pixel coordinates and once I had obtain my contours, ...
2
votes
2answers
81 views
Longitude values in GeoJSON out of range -180 to 180
I've extracted a geojson data file from QGIS for a transportation layer.
Now in the file, I can see multiple entries like the following:
{
"geometry": {
"...
1
vote
0answers
190 views
Getting boundary coordinates from given lat,long and radius [closed]
I have:
lat-long : (41.8719 , 12.5674 )
Radius: 50 meters
I want all the boundary coordinates from that given point.
I would like some scala code for this.
0
votes
1answer
48 views
Is there a PostGIS function for checking the validity of a lon/lat pair, given a coordinate system?
I have data with lon lat pairs that I'm converting to geography types. Some of the pairs, however, are corrupt -- in my case, very negative values for longitude.
Is there a helper function in ...
11
votes
3answers
227 views
Latitude above and below the surface of the Earth
I know that Geodetic Latitude is measured with respect to the normal at a point on the surface of the reference ellipsoid. But what about points above and below the surface? Do they follow a ...
0
votes
0answers
113 views
Is there a “vincenty” version for calculating the elevation between two points?
As many of you know Vincenty is a great tool for calculating the azimuth (e.g. bearing) between two points with reference to True North. Currently, I have a python script that takes two coordinates in ...
1
vote
1answer
114 views
Correct way to use WGS84 (lat/long degrees) in QGIS [duplicate]
I created new project in QGIS (v3.2.1)
Added a OSM Standard layer with QuickMapServices plugin. Current CRS is EPSG:3857
Now I want to use map in degree units. As far as I understand I need to ...
1
vote
1answer
69 views
Manually set QGIS vertex coordinate in lat-long format
I'm new to QGIS (and GIS in general)
I'm creating a map and would like to manually enter lat-long coordinates in decimal format.
As you can see, the vertex editor uses a different coordinate ...
1
vote
0answers
48 views
Mapping pixel coordinates to lat lon
For a deep learning project, I trained a YOLO based model to detect objects on satellite images (from spacenet dataset; epsg:4326). However, as the Darknet only takes JPG/PNG images as input(to the ...
2
votes
2answers
122 views
Oblate ellipsoids and latitude
I've been reading Wikipedia and am having a bit of trouble.
https://en.wikipedia.org/wiki/Latitude
Geodetic latitude would clearly change if the Earth were squashed vertically.
But would places ...
0
votes
0answers
32 views
Latitude of landmarks
I am new to mapping. Is there an online resource that lists both the geocentric and geodetic latitudes of various world landmarks?
1
vote
0answers
41 views
Latitude of Earth reference ellipsoid [closed]
I am trying to create a graphic demonstrating the difference between an idealized perfect sphere and the Earth's reference ellipsoid. (I know this is also an approximation, but nevertheless.) To this ...
