Questions tagged [coordinates]

Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.

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1answer
522 views

Height of the geoid in ECEF coordinates

I know that the relationship of geoid height N and ellipsoid height h to orthometric height H is defined by H = h - N, but what if I have some position in Earth-Centered-Earth-Fixed (ECEF) coordinates?...
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1answer
23 views

Get the begin and end coordinates of city municipality

I am not sure if this is the right place to ask this question. I would like to have an idea of precise coverage (extend) for the latitude/longitude of the city of Porto, Portugal. This is in ...
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21 views

Creating Thiessen polygons using ArcMap

When creating the Thiessen polygon for a X,Y co-ordinates. It is showing like this. When I set the extent manually I'm not getting the polygon properly.
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1answer
29 views

Trouble importing coordinates

I'm having trouble importing coordinates. I have a map over Scandinavia, and I need to import sampling coordinates that I've downloaded. The CRS I'm using is SWEREF99 TM EPSG:3006, and the format I'm ...
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1answer
64 views

Infering course given origin and destination coordinates

I have two points. A vehicle is at point A and I have the coordinates at point A. The vehicle moves to point B and I know the coordinates as well. I would like to find the angle of movement i.e., 0,...
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1answer
23 views

Convert lat/lng to x/y pixel 2D PNG image

I have a 2D PNG map which I know the corners of my image and I also have the image size all as below: image size: 600x600 pixel top-right coordinate: (35.74706129,52.08012633) => (lat,long) ...
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2answers
1k views

SharpMap Coordinate transformation Problem

I want to transform my layers from SRID 31463 (Gauß Krüger) to Webmercator. Since SharpMap does only know webmercator and WGS84 i tried to create the Coordinate System 31463 by WKT and applied it on ...
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31 views

Get point layer from CSV with coordinates in meters [closed]

QGIS 3.10. Project in WGS 84/UTM zone 41N. Trying to create new point layer from CSV file, where coordinates for X and Y are given in meters (MSK-66 zone 1 - one of local CRS for Russia based on Gauss-...
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1answer
134 views

Generate coordinates with Minimum/Maximum distance from given coordinates

Background: I am trying to create a coordinates generator for Unit Testing my code. I would like to try to test cases for methods like: // Check if within 10km. // Should pass because it is 0 - 10km ...
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1answer
33 views

Determining how many of my coordinates overlap with layer in QGIS?

I am working on a project about a certain animal species. I have gotten coordinates from where the species has been observed. Now I want to know what percentage of the observations are from gardens/...
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23 views

Create shapefile without coordinates

I am trying to create a shapefile without XY coordinates. I have the address, but not coordinates and there are too many entries to enter them manually. I am then going to join that to another data ...
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2answers
4k views

Interpreting .ASC/LiDAR Data?

I'm a complete novice to the world of GIS. I'm involved with a project which requires LIDAR data to be imported into CAD software. When I go to the geostore, which contains LIDAR survey data ...
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1answer
26 views

Finding latitude and longitude limits for a sub-region given its name

In order to extract climate data from Copernicus, there's the Sub-region extraction section that allows one to extract data from a region within specific coordinate limits. I am wondering how should ...
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1answer
447 views

Extract derived data fields from Shapefiles

I've uploaded shapefiles with professionally supplied survey data into QGIS and it all plots fine, then when I export the attributes table into Excel I see that the XYZ values are all zeros. I know ...
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1answer
34 views

Swapped coordinates when adding SHP created in QGIS to ArcMap

I've created a shapefile layer in QGIS with contours in national coordinate system - 5514. Everything seems okay but when I add the layer to ArcMap, the whole layer is rotated and placed in totally ...
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2answers
35 views

Geodetic transformation with Mars data: 'ographic to 'ocentric latitude

Introduction I am working with a few raster datasets covering the south polar region of Mars. Some use a coordinate system with aerographic latitudes, which are equivalent in concept to geodetic ...
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1answer
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Given Lat and Lon identify if point over land or ocean using R

In R, how do I identify if a point is over land or ocean? e.g. for: set.seed(0) lat <- runif(10, -80, 80) lon <- runif(10, -180, 180) points <- expand.grid(lat, lon) I would like to create a ...
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1answer
49 views

GeoJSON file content not display properly in Leaflet

I am new to Leaflet. Am facing one issue when try to display GeoJSON file in Leaflet. Issue: Actually some GeoJSON file only am facing this problem. In my knowledge coordinates are in different ...
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18 views

Export DXF from QGIS but it's not same coordinates with Google Map

I'm a newbie in QGIS software. Now I have a problem, please help me I export project to DXF and then copy it to Autocad with drawing use coordinates of Google map, but it's not some location. Thank ...
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1answer
68 views

Georeferencing CAD drawing and setting ground control points in GRASS?

I'm fairly new to QGIS and Grass GIS, and learning the interface. I have a CAD drawing that has no coordinate system assigned and needs to be georeferenced to NAD83 HARN Northern Colorado (feet). I'...
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0answers
13 views

Problem with the correct calculate of the bisector of the angle

I have a problem with the correct calculate of the bisector of the angle. I use WGS84 projection. I have a bisector's bearing (azimuth), coordinates of start point and line length as input. Some ...
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1answer
129 views

Creating coordinate points based on polygon

I am trying to create coordinate points based on a polygon that I've created in Google Maps and imported into R as an sf object. Specifically I have sample points of physical samples I've taken, but ...
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1answer
173 views

Converting XY coordinates in the Iberian peninsulate to lat, lon?

I have been looking for a way to convert XY coordinates (from a coordinate system based on ETRS89) to latitude and longitude coordinates. So far I have this function: from pyproj import Proj, ...
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9answers
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Generating random locations nearby?

I am trying to create random locations nearby my location. What i want is to create random latitude/longitude pairs inside a 200 meters circle surrounding my location. This is the formula i came up ...
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0answers
10 views

Orientation in 3D coordinate space of a pixel in georeferenced video imagery

I am trying to find (a) method(s) to extract the position in 3D coordinate space of a bounding box (detected object in 2D video imagery) having knowledge the below: I have multiple images with ...
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1answer
6k views

What simple and light Java library to use for WGS84 to UTM conversion?

Geotools and Geotoolkit are huge and complicated. CTS (1.3.3 from Maven) failed on me by not even being able to run its own test example (slightly modified https://github.com/orbisgis/cts/blob/master/...
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48 views

Misaligned layers - vector & raster

I am doing geomorphological research in South Iceland using ArcticDEM data, LSD TopoTools software and QGIS. I'm having an issue with my geology layer (an ArcGIS feature layer) being a few hundred ...
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1answer
66 views

Converting TotalStation native field data to coordinates

I'm trying to convert field data from an older Sokkia TotalStation machine, to coordinates. I've looked at Copan but as far as I can tell it doesn't support the file format. There are some outdated ...
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1answer
60 views

Map eastings in QGIS 2:18 Print Composer alternate between correct values, then negative values

Using CRS OSGB 1936 (ESPG 4277) at various map scales in Composer, I find that the northings are all correct, but the eastings alternate between two or three correct values, then two negative ones. I ...
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1answer
131 views

ISO 3166-1 alpha-2 Country and region location in coordinates

I am doing some mapping that requires country and region average coordinates. I've found this very useful table with the coordinates of countries, their ISO 3166-1 alpha-2 code and the average ...
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1answer
97 views

Drawing a marker on a shapefile with the given latitude and longitude?

I am using shapefiles to draw a custom map. They were created successfully with the help of ArcGIS Desktop. Now I need to draw a marker on shapefile based on an existing tuple of lat, lng. How can I ...
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0answers
27 views

How to convert XYZ to from-to format with azimuth and dip information? [closed]

I have an Excel spreadsheet with header, survey, and assay drill data. Header data contains hole ID, location coordinates, and length. Survey data contains related downhole survey with distance, ...
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0answers
18 views

Obtaining latitude and longitude on Earth from Satellite location and pointing angles

Considering the Earth as a perfect sphere and knowing the position (latitude,longitude and height) of a satellite. I would like to transform the pointing angle from the satellite (defined by two ...
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0answers
33 views

Finding coordinates by Azimuth

I am working on a forest project. I have one central point (I know coordinates of it), than I have azimuth and distance of trees from this central point. How can I find coordinates of trees? p.s. ...
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1answer
77 views

about a widget to get coordinates in web api?

I'm need to know if there is a widget that let me draw a geometric figure in the map, and get the coordinates of the selected area. Any similar widget is welcome.
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1answer
17 views

How to reproject Raster/Vector in Global Mapper with custom geographic parameters?

I am using Global Mapper 21 and i want to reproject raster/vector data with custom geographic parameters. I can do it with ArcGIS (create custom geographic transformation). I have 7 parameters that ...
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0answers
22 views

Create polygons from coordinate pairs in CSV?

I have two csv files. One contains attribute data for military bases. The other contains their polygon geography as lat/long coordinate pairs. How can I link up these two CSVs and turn them into a ...
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0answers
43 views

Compute elevation and azimuth from lat, lon, and altitude

Given the latitude, longitude and altitude of two points (in my case satellite and ground antenna) I would like to compute the azimuth and elevation angle between the two points from the ground ...
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1answer
1k views

Get coordinates from EXIF

I wonder if it is possible to know if with the EXIF ​​data of a photo you can get the angle with respect to x or y (latitude or longitude) to position it on a map. Or given the EXIF ​​data to ...
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1answer
24 views

GeometryCollections do not have coordinate lists

I have code that suppose to break multipart geometry into single part by generating list of coordinates for each polygon. The code works perfectly for small amount of polygons, but today when I tried ...
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1answer
43 views

Put an image file on the map in QGIS without coordinates

Is there any way to put an image file on the map in QGIS 3.12.1 and move it anywhere. For example, there is a map with national parks and I want to add an image (SVG) as a symbol, without coordinates ...
2
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1answer
39 views

How to retrieve the spatial coordinates of the Massif Central?

I am new to geostatistics so I am looking for a solution to recover data for the geographic area of the Massif Central. I can easily retrieve all departments when it is the entire departement but the ...
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5answers
2k views

what is the suitable projection coordinate system for Iran

I am doing analysis for province wise Iran. I am using WGS1984 as my geographical coordinate system, and I do not know which is suitable Projection coordinate system for entire Iran. I feel the UTM ...
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0answers
23 views

Distance between different points

I am looking for a way to calculate the distance between different points in a linestring. In practice I created a linestring from a X and Y coordinate by means of st_linestring(asNumericMatrix(...
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2answers
35 views

MapInfo Pro 15.2 incorrect coordinates when updating column

I have an issue getting the correct coordinates when updating the columns, if I double click on the individual object then it comes up with the coordinates in UTM. However, even when I change the map ...
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3answers
2k views

Change coordinates of a polygon

I wanted to know whether it is possible to change the coordinates of a Polygon by typing them in. I don't want to have to manually drag them into the right position.
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2answers
113 views

Adding coordinates to attribute table

If I use the 'Add coordinates to point' it adds the coordinates to in the file, however splits the data into the amount of objects in the original file. If I try to add separate columns in the ...
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2answers
74 views

Convert raster to CSV with lat, lon, and value columns

I'm looking for a process to convert ASCII gridded data (in this case 60min/1 degree gridded ASCII population data (GPW) from SEDAC: https://sedac.ciesin.columbia.edu/data/set/gpw-v4-population-count-...
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1answer
21 views

Missing data in SpatialPolygonDataFrames R: error in Moran.plot

I'm trying to use Moran.plot on a SpatialPolygonDataFrame (the world map from the rworldmap package) consisting of 234 elements in R. My database contains 81 countries, so there are 162 codes in the ...
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1answer
2k views

Unable to dynamically locate map boundary coordinates in OSM/Leaflet

I have been trying for the past hour to take the coordinates of the map edge in a OSM/leaflet application I am making. While I can get the coordinates of the center, and I can get the coordinates of ...

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