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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21 views

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

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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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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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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23 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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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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1answer
23 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
42 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 ...
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1answer
11 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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1answer
38 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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ArcMap showing wrong coordinate

I reprojected 4 shapefiles to "WGS 1984 UTM Zone 31N" and I choose the same coordinate in data frame properties, I get wrong coordinate display at the down right corner of the ArcMap "-1.462 -0.006 ...
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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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Converting spatial points to spatial polygons using R

Is it possible in R to convert spatial points to spatial polygons? Why I am asking: Need to create Queen contiguity neighbors for each NUTs3(Nomenclature of Territorial Units for Statistics) region ...
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2answers
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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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How to convert Coordinates (Lat/Long) to GeoIDs?

I am trying to build an index to look up FIPS codes for census blocks, given a pair of coordinates (latitude, longitude). I know the Census API has this functionality. However, I need to build an ...
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2answers
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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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1answer
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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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GML file provides wrong coordinate system

I have the following field 51A. It is described by the following GML excerpt: <gml:featureMember> <ogr:av_export_temp.ihkulroo fid="av_export_temp.ihkulroo.183"> <ogr:...
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Why a rectangle area is described as a 13-point polygon in a GML file?

I have the following field called 51A: I have the following excerpt from the GML file where it describes the 51A field: <gml:featureMember> <ogr:av_export_temp.ihkulroo fid="...
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1answer
80 views

Show the coordinates at the centre of a map in OSGB format?

I am using QGIS v3.12 and projection EPSG:27700 - British National Grid. I am trying to add a label to my map layout which will give the grid reference of the centre of the map as a UK 8 digit grid ...
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2answers
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Create new custom projections in QGIS 3.12?

QGIS does not have the coordinate reference system I need, So I decide to define a new custom Geographic coordinate system. To define a CRS, I selected customProjection Custom CRS from the Settings ...
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1answer
162 views

Convert Longitude/Latitude to GTA V coordinates

This problem is very similar to this post from awhile back, but it was never solved. I am trying to create an interactive GTA V Map with the Leaflet JS API. I want to convert the longitude and ...
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2answers
60 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
91 views

Two vector layers, same CRS, wrong coordinates

I have two vector shapes, downloaded from government providers, that should be overlapping perfectly but one appears way of to the east of the other one. They are both set to the same CRS. I work ...
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38 views

The difference when converting WGS84 to EPSG:3857 in MapInfo and GDAL

Please help me solve the problem with the coordinate shift. I have two TAB files, with coordinate systems - one in meters, the other in degrees. GDAL says they are: file A: LOCAL_CS["Nonearth",UNIT["...
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1answer
35 views

How to translate a pixelCoordinate between different map sizes? OpenLayers 6.3.1

My starting point for this question is the ability to print a map with a given format&resolution, very similar to the "Export to PDF" example at OpenLayers webpages: https://openlayers.org/en/...
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1answer
98 views

Adding x,y coordinates from table in Google Earth Engine

This might be quite basic, but I'm struggling with adding points to a map from a CSV table of x,y coordinates in Google Earth Engine (I have over 2000 points). I have managed to add the points as a ...
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62 views

Winkel II fails while reprojecting on the fly in QGIS 3.12

Currently, in QGIS 3.12 the Winkel Tripel projection working on the fly but Winkel II, which is also implemented, is not working. This is the fact or there is a bug? If I reproject dataset into ESRI:...
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25 views

Aligning different vector features and vector features with rasters

I am fairly new to GIS and I encountered this problem concerning projections. Maps don't align despite having the same projections (according to the Properties - XY Coordinates). I already tried with ...
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2answers
36 views

Coordinates of WKT in PostgreSQL

I have a table in PostgreSQL. And it has no X and Y coordinates. But, it has a geom column with the WKT. Also, I have created an empty column called LAT and other called LONG. So, what I want is to ...
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1answer
54 views

Plot points with coordinates from txt-file [duplicate]

I'm using QGIS 3.12. I have a list of coordinates in txt file, as follows "longitude" "latitude" 48.819056, 2.127009 48.782213, 2.143340 48.801580, 2.355238 48.904471, 2.296038 How to ...
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1answer
37 views

Insert Dataframe data into a map using Geopandas

I posted my question in stackoverflow previously, howeverI think this site is a better place to find some clues (this is my first project with spacial data). I need to insert some coordinates from a ...
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28 views

Elegant ways to express coordinates and zoom level in urls [closed]

To make sharing map locations more natural I'm looking at updating a map service to sync the browser url with the current center point coordinate and zoom level the user is viewing. At present the ...
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2answers
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Measuring perimeter and area of QGIS polygons and middle point coordinates

I have >1000 shapefile polygons on a QGIS project that I need to find the perimeter and area of. They're located on a world map, and I can't seem to get the geometry outputs for the measurements in ...
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1answer
504 views

Pixel coordinate to world coordinates using Python

I have developed a semantic segmentation method to map certain objects in aerial imagery. Throughout this project I download pictures (4800x4800 pxs) where I know the min_x, min_y, max_x and max_y in ...
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1answer
66 views

What coordinates: 6 digits, 8 decimals and how to convert to Lat & Lng

I have found a public GeoJSON dataset that uses coordinates I can't identify. The first tuple is: [146476.39635656,165501.27742543] This tuple is located in Brussels, Belgium (UTM 31) and is close ...
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1answer
101 views

Flipping coordinates with Shapely

I have Shapely geometries where latitude and longitude where mapped to X and Y the wrong way around. Latitude is mapped as X, longitude as Y. How can I fix the coordinates so that the current X and Y ...
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1answer
28 views

The expression x(start_point($geometry)) doesn't return anything, how can I fix it?

I'm trying to get the coordinates of start and end of lines in a layer, but the expression x(start_point($geometry)) doesn't return anything, what's wrong? Here's my code: capa = "//atlantico2/...
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1answer
53 views

Determining XY location [closed]

I am new to a system and the information it gives me for job sites is XY(238391648,71539666):294616358697. I have been trying to use convertors to change this to a longitude and latitude definition ...
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1answer
50 views

Point placement between midpoint and endpoint

I have a line with a, Mid Point End Point I'm trying to return a coordinate that's LENGTH away from Mid point (on the same line) and between end and mid (oppose to between Midpoint and the ...
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1answer
41 views

Unable to deserialize entity which contains field with type org.postgresql.geometric.PGpath

I have an Entity which has a field named coordinates of type org.postgresql.geometric.PGpath : public class Geometry { ... @Column @NotNull private PGpath coordinates; I am trying to ...
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26 views

Can't enter coordinates on Samsung phone for collection with ArcGIS Collector

I am using a hand-held GPS to collect accurate location coordinates of a given feature in the field. Later, when I have access to a wireless network, I'm using my Samsung phone (Galaxy A8) to enter ...
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1answer
38 views

Make PostgreSQL recover two geometry coordinates points split into columns

So I want to make a SQL that converts my PostgreSQL coordinates (x1,y1,x2,y2) to 4 different columns. By now this is what I have: trim ('MULTILINESTRING((' from (split_part(ST_AsText(SSDMT.geom), ' ',...
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81 views

Get coordinates from polygon points on MapBox draw?

This is the code I am using for polygon to draw and I am using MapBox GL draw I am trying to get longitude and latitude of every point from polygon. var draw = new MapboxDraw({ ...
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1answer
64 views

Plotting points using a list of lat & long coordinates

I have been given a list of latitude and longitude coordinates in a .csv file and asked to plot them on a map. There are multiple other columns of data about each point included in the excel file. I'...
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1answer
22 views

Trying to create a map with co-ordinates

I'm trying to create a map with the co-ordinates for the location but if i select map units it creates black boxes in the corners of the map instead of a line of co-ordinates. If I used centimeters it ...
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1answer
88 views

Error: could not find the function crs [closed]

library(sp) coordinates(acg) <- ~lon+lat Error in coordinates<-(*tmp*, value = ~lon + lat) : setting coordinates cannot be done on Spatial objects, where they have already been set ...
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1answer
29 views

How to get the first point's coordinates of a column with type path

I have the table above CREATE TABLE public.geometry ( id serial not null primary key, distance float not null, height float not null, coordinates path not null, ...
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2answers
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Reducing a box while keeping its center?

So I have to draw a second box inside the original box but reduced by a factor. I have the first coordinates of the box and I have to calculate the new coordinates that would draw the new box. def ...
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25 views

Coordinates do not export in UTM format I can use

I am trying to export my attribute table so I can view the UTM coordinates, which I need to present in a table in my report. I have got as far as exporting the X and Y coordinates, using the same ...
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2answers
239 views

Calculating a bounding box by its center point and ratio, the map zoom and desired pixels width in Leaflet?

I'm trying to add dynamically an overlay on a leaflet map. I know the overlay center - {lat:50.8466,lng:4.3528} overlay ratio - 16/9 map zoom - 15 desired pixels width - 200px How can I calculate a ...

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