Questions tagged [latitude-longitude]

Angular geographic coordinates that specifying the north-south and east-west positions of locations.

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26 views

ArcMap doesn't read geocoordinates from excel [closed]

I am unable to display X and Y fields in the display XY data dialog box.
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24 views

Derivation of Lat/lon given radial and distance [duplicate]

I'm looking for a derivation of the following aviation formula. I found this on one or two other sites as well but no explanation. http://www.edwilliams.org/avform147.htm#LL I took a stab at this ...
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28 views

Accuracy of Google maps/HERE maps

According to this article in https://junipersys.com/support/article/6614, I have a basic understanding of the accuracy of GPS data. Through calling Google Maps/HERE Maps API, we are able to receive ...
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1answer
47 views

Projection of map to WGS 84 3857 in QGIS ends up shapfile on 0.0 (near Africa) [closed]

I have a building shapefile in my country which, when imported is in CRS EPSG 4326 - WGS 84. I need to project this to typical latitude, longitude values (If my GIS knowledge is right, to EPSG 3857 - ...
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2answers
48 views

Obtain min and max lat,long for all geometries using GeoPandas

I am reading a shapefile of a county and need to extract the min and max coordinates across all geometries. It seems like this is possible with each individual geometries in the shapefile with shapely ...
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2answers
36 views

Converting DMS to coordinates with +/- signs

I am looking to convert Degrees/Minutes/Seconds coordinate data into decimals for plotting. However, I am unfamiliar with the science behind the +/- signs given by the longitudinal coordinates. I have ...
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30 views

How is it that ArcMap and QGIS produce feature classes with different numbers of points and different coordinates from the same TIFF?

I have a 300m by 300m B&W TIFF map of Brazil, and I need to convert all the pixel values into a point feature class. When I do it in ArcMap using Raster to Point, I get a feature class with 92,054,...
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31 views

Adding relative spherical coordinates to absolute Lat/Lon/Alt coordinates

I have an absolute position of an observer given in Lat/Lon/Alt (on earth, ellipsoid). The observer observes an object and measures azimuth (angle), elevation (angle) and range (NM) to this object ...
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2answers
43 views

Why is there a difference in latitude/longitude for the same place?

I am a complete newbie to this field. When I look up that lat/lon of a place on the web, I see different values reported. For example, for Jamaica Bay, New York, Google shows 40.6057°, -73.8713°. But ...
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30 views

Field calculator: Adding coordinate fields to attribute table with DECIMAL DEGREE values instead of UTM [duplicate]

I have a shapefile layer with several points, each with its own ID. The attribute table just shows the IDs of these points. Now I want to add two new fields with the coordinates (lon/lat). I'm using ...
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3answers
48 views

Angle of lines between two points varies between “90” and 270"

I have several sets of points on a layer, with all sets of points in nearly the same geographic location. I use the "points to paths" function and then explode the lines. I then use the ...
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Getting a rasterized object from irregular lat and long data

I have a dataframe (I've named it ozone2raster) with latitude and longitude points, and values for ozone concentration that I want to use for making a rasterized map. The dimensions of this dataframe ...
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81 views

How to compute an n*n time matrix in R if n points with longitude and latitude is given?

The basic idea here is, I will provide a dataframe with name/id, longitude and latitude as input and will be able to generate a time matrix. osrmTable from the osrm package is doing the intended job ...
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1answer
86 views

Converting “Degrees Decimal Minutes” to “Decimal degrees” in Python

I'm trying to convert the following format to decimal degrees: 45° 17,896' N Is there any module that I can use? I tried using dms2dec: from dms2dec.dms_convert import dms2dec lat = dms2dec("45° ...
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R: Clustering observations together based on distance and time

In R, I have a dataframe with roughly 3 million observations, with the columns being longitude, latitude and time respectively. My goal is to form clusters (using a custom distance function), and then ...
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1answer
82 views

Adding latitude and longitude to QGIS file without losing the current xy coordinates

I plan to convert a .dwg-file to QGIS. The coordinate system of the .dwg-file is set up in feet in the x and y directions from a point near the bottom center of the drawing. This coordinate system ...
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28 views

Embedding interactive Google Maps into a Google Form

I have a Google form with some questions. People can answer the questions about (future) trees they want to have in their neighbourhood. But there also must be the possibility that people mark the ...
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30 views

Probability of latitude and longitude

I had made an Android app which send current Latitude and Longitude of user to my server continuously, on the server I calculate 5 KM in circular way of user location to find the nearest known points ...
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1answer
27 views

Is there a convenient way to uniformly partition the United States into “buckets?”

I'm not a GIS professional, it's just that my current project is heavily reliant on geospatial data. I'm currently working on a project that has to do with transportation behavior. My hypothesis is ...
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14 views

Plotting lat/long with Tableau averages it out

I'm trying to plot crimes by lattitude and longitude on Tableau Public. Yet the software averages it out the values: I've watch this tutorial but, as you can see on the screenshot, I don't have the &...
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1answer
97 views

Translating X, Y coordinates to lat/long

I have X and Y coordinates from a resized image that has its origins from a Sentinel 2B photo. The original photo is 109.681 by 110.334 km. The re-dimensioned file is 370 by 369. I also know the ...
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1answer
91 views

Calculating coordinates for halfway around world from given location

I am curious about how to mathematically determine "half-way around the world" from a given spot. For example, from where I live in Monterey, what is half-way around the world heading either ...
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2answers
150 views

Converting X and Y coordinates Data to Latitude Longitude

I have a data file that contains locations of different places of Wilmington, North Carolina. The data file contains the X Coordinates, Y Coordinates, and Latitude. I want to calculate the Longitude ...
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1answer
47 views

Converting 7 digit coordinates to Latitude and Longitude (Ohio, USA)

I have a dataset of traffic monitoring stations in Ohio, and I am trying to locate these stations in Lat/Long. Here is an example: This station is located in Franklin county, along Interstate 71. ...
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1answer
31 views

Convert latitude/longitude to three dimensional space

I am working to convert longitude to latitude to three-dimensional space in the form of x,y,z. def transform(lat, lon): x = np.cos(np.radians(lat)) * np.cos(np.radians(lon)) y = np.cos(np....
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34 views

Are latitudes -90 and +90 both valid in WGS84?

Geometrically, I understand that a sphere can be addressed in latitude and longitude on the ranges [-90, +90] and (-inf, +inf) respectively. However, I am working on the specification for plus codes, ...
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96 views

Calculating latitude from X,Y-coordinates on Mercator projection

I have a task to create a map of a specified section of the world. In particular, I need to map everything between the 120E and 100W longitudes and everything between the 60S and 30N latitudes mapped (...
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2answers
47 views

Move moved long and lat to their own position

I have a dataset with point that have fields containing latitude and longitude. I have displaced some points (up to 2 mts) and saved the modification. The field containing the original lat long in the ...
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20 views

Unable to join data by field value

i have a dataset which contain object_id, poi_x and poi_y and another data set with same object_ids but different poi_x and poi_y. i want to join poi_x and poi_y from second dataset to first dataset. ...
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1answer
84 views

Accuracy of latitude and longitude based on decimal places [closed]

After reviewing various information regarding accuracy of latitude and longitude for specific decimal places, I have a question regarding the information that many have posted, such as in Measuring ...
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1answer
135 views

Converting table UTM coordinates to decimal lat-long in Attribute table using expression

I would like to formulate an equation in the attribute table calculator tool to calculate the decimal latitude and longitude values from the existing UTM NAD3 coordinates in the table. The UTM NAD83 ...
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35 views

Display both data in different fields in QGIS attribute table [duplicate]

In my attribute table I have lat_1, long_1 and lat_2, long_2 in the same row. How can I display both at the same time. Is their any solution for that in QGIS. lat_1, long_1 are main location lat_2, ...
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28 views

QGIS 3. Simple point or line layers manually

Trying to correlate historical submarine cable interruptions with geological events. Found a perfect raster-view of seabed and an .shp file of tectonic plate boundaries. I want to create individual ...
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1answer
21 views

Add reference lines at specific degree/minute/seconds?

I need to add reference lines at specific latitudes, like the image here: https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=113031&inline Here's what I've tried/found so far: I found ESRI's base ...
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1answer
99 views

Displaying both data in different fields in QGIS

I have a Shapefile that is automatically loaded in QGIS. While loading the data the coordinates x & y are automatically displayed. In my attribute table I have lat_1, long_1 and lat_2, long_2 in ...
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3answers
181 views

How to overlay layers with different SRID using QGIS and PostGIS? [closed]

I have a map of the Netherlands imported from a SHP-file into my PostGIS environment with SRID 4289 (Rijksdriehoek Amersfoort). When I connect using QGIS to the PostGIS database and add the layer with ...
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369 views

how to convert X, Y coordinates pixel of the screenshot image.png from the map to really Long, lat

I need to convert the x,y coordinate of the PNG image from the map into Latitude and Longitude. I took an image from google-map that map image is cut from the part of the city here is a sample image ...
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23 views

Trying to convert a shapefile that seems to be using UTM coordinates to WGS84 in QGIS [closed]

I've been trying to convert this polygon shapefile of historic Swedish parishes from UTM coords to lat/long and nothing seems to be working. I've tried defining projection, reprojecting, saving these ...
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47 views

What Coordinate Reference System does iNaturalist export observations in?

iNaturalist has a nice export tool which selects up to 200,000 observations based on a query and writes them as a clean CSV, including latitude and longitudes where provided. To import that CSV file ...
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23 views

Get Census Tract given a Census Block OR Get Census Tract given Latitude/Longitude

I'm using Python and am looking to get the Census Tract of a location given either a latitude and longitude or a census block. I can get the census block given latitude/longitude from here: https://...
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29 views

Getting incorrect northing/easting in proj4 from converting Lat/long to NAD83 Maine West 1802 [closed]

I'm trying to convert latitude/longitude to northing and easting via proj4js. This is the string im using to project from. +proj=tmerc +lat_0=42.83333333333334 +lon_0=-70.16666666666667 +k=0....
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52 views

How to calculate corners of a rectangle based on Cartesian coordinates

I would like to draw a rectangle based on a center point lat and lon assuming a given length and width, let's say 4.5m and 1.5m, respectively. I guess, we need the bearing too. I've made a simulation ...
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1answer
71 views

Very simple Latitude/Longitude to WGS84 conversion

As from here, I'm using the OpenTopography API to download a geoTiff heightmap, and it uses 4 WGS84 Coordinates, but the map I've supplied to the user gives back longitude/latitude coordinates. I'm ...
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1answer
38 views

Changing degrees to metres [duplicate]

I got a shapefile which is in degrees format. For a vector analysis, I need it to be in meters to set a maximum distance. I can't do that with degrees. I know about on the fly CRS change; That's not ...
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2answers
34 views

QGIS: Custom formatting coordinate grid to reduce number of decimals

I am making a coordinate grid system of a map I have made, but now I would like to reduce the number of decimals of the seconds (of the latitude and longitude). So instead of 36°54'0.000"E -> ...
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0answers
38 views

Conversion to longitude/latitude

I am very new to GIS. I wanted to find out if it is possible to convert coordinates as specified in the table below to longitude and latitude c
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0answers
28 views

Haversine formula on rotated poles sphere

I'm working with climate data from the CORDEX domain WAS-22. The data are on rotated poles grid defined as: char rotated_pole; :long_name = "coordinates of the rotated North Pole"; :...
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2answers
38 views

Exchange of coordinates in GeoPandas

I was plotting some points with the plot function in GeoPandas. I realized that when I plotted using Point.lat, Point.long, the points didn't fall at the right place but when I exchanged the ...
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1answer
130 views

How to separate one column with latitude and longitude into two columns. Lat/long are not separated by anything

I'm a GIS novice. I have a CSV file that contains the latitude and longitude data for a small region in the northeast U.S. The data appear in one column appearing as one uninterrupted string of text ...
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3answers
137 views

List of extreme latitudes and longitudes for each US state?

I need a list of extreme latitudes and longitudes for each US state. That is, max / min latitude, max / min longitude. The purpose is to exactly center each state map when initially shown. I found ...

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