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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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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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2answers
424 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 ...
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1answer
37 views

How do you turn coordinates vertical in Map composer?

When using map composer in QGIS, there is the option to `Draw coordinates'. once selected, the coordinates are situated in the horizontal position (as seen below). Does anyone know how to align the ...
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1answer
55 views

Interpreting x, y coordinates from ASCII elevation data?

I'm using Environment Agency DTM LiDAR data which I import into Mathematica in ASCII format to produce ground surface models, sections, etc. The process works fine, but I'm unclear whether the cell ...
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1answer
41 views

Changing the coordinate value of a Pointz object with python

How can I change the X,Y or Z value of a Pointz feature with python in QGIS? I am trying to change the Z values of Pointz with a python plugin. I am first trying to pass the selected feature to a ...
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3answers
70 views

QGIS: list of coordinates to polygon [duplicate]

In the course of a monitoring exercise for small scale farmers, we captured the coordinates of fields using a GPS tracking in the SurveyCTO app. We used automatic capturing of the coordinates every 5 ...
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1answer
12 views

Resampling raster to even coordinates (no decimals) using ArcGIS Desktop? [duplicate]

I am resampling a raster from one CRS to another, and from 0.5 m resolution to 10 m. But I want the new cells to have even coordinate extents, instead the old coordinate decimals remain. How do I fix ...
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1answer
77 views

What coordinate format are these coordinates in?

I am looking at some old data, and I encountered a data point with a latitude and longitude coordinates in a format that I'm not familiar with. I tried researching some other formats and tried ...
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30 views

Python Helmert Transformation parameter and residual handling [closed]

I'm looking for some starting points to implement an algorithm to calculate Helmert Transformation parameters (4- and/or 7-parameter). I found already some basic implementation e.g. https://github.com/...
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1answer
288 views

Defining CRS for objects in Kyrgyzstan

We are currently working on two cities in the South of Kyrgyzstan (Aydarken and Kadamjay). They are visible on the map screenshot below (purple dot). For reference, the grid is Lat/Long WGS84 (DD). ...
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1answer
42 views

Changing coordinates of shapefile using ArcGIS Desktop?

I have a shapefile that has meters as coordinates, and these do not reference world datums or projections. Is there a way to assign completely new coordinates to the shapefile so that they align ...
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1answer
34 views

Coordinates are not displayed only attribute table

I am new to QGIS and I have uploaded a second set of coordinates as a delimited text layer. I followed all the steps and the coordinates are in the same format as a previously loaded layer, but the ...
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15 views

Computing virtual centre of series of points?

I have a series of point (latitude/longitude) with a date and time. I would like to determine a virtual centre point between 12h00 and 14h00, and between 18h00 and 22h00. To make it , i assemble ...
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1answer
49 views

Geopandas - Import CSV: make polygons from X,Y Coordinates based on ID

I'm working on a script, where I want to import a CSV file with coordinates and an ID which should be used to make a polygon shapefile from those. CSV file looks like this (example): ID, X, Y 10,15....
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2answers
37 views

How to make the coordinates of point appears as labels?

I am working on a school project that requires us to have a map with the points indicating different station with its coordinates appearing as a label. I just don't know how to do it? I think it ...
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1answer
50 views

Problem entering coordinates

I am trying to import coordinates in QGIS but they only appear as single line in the delimited text file. What am I doing wrong?
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0answers
34 views

How to use coordinates search bar in QGIS?

When using coordinates search bar in QGIS, it sends me to a completely different location. The GPS coordinates style is 37.381096, 14.561191 and the project is set to EPSG: 3857 with OpenLayers ...
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2answers
106 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 ...
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1answer
31 views

Export central coordinates of current map in print layout

I am trying to export the centrum coordinates of the current map in the print layout, and show the coordinates as a text element. I have succeeded to print the centrum coordinates of a geometry in ...
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1answer
28 views

Extracting point data with PyQGIS? [closed]

How to extract x,y,z values from a point/node in PyQGIS? I am working on QGIS 3.
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1answer
32 views

Making UPDATE for coordinate does not return the same value

Being totally new with PostGIS, I am trying to UPDATE one of my column on my table. The column itself is called 'center_point' with type of GEOGRAPHY(Point,4326) UPDATE cities SET center_point = ...
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0answers
42 views

How to find coordinates of a triangle with azimuth?

I am just starting out in GIS and it's been a long time since I took math in university. I am teaching myself through a textbook but there are a few questions I am stumped on. Essentially I have a ...
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1answer
22 views

Two different CRS somehow works? [duplicate]

I am overlaying some WGS84 (EPSG:4326) coordinates over a few DEM rasters with EPSG:102710 (NAD_1983_STATEPLANE_NEW_HAMPSHIRE_FIPS_2800_FEET) When they are these two different layer CRS the ...
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1answer
19 views

Extra attribute is embedded into KML file after conversion

I converted point shapefile into KML which has two columns, one is Name of School and second is Coordinates. "Coordinates" column has only 10 rows. And in the "Name of School" column, there are 30 ...
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1answer
43 views

What is the formula to convert geodetic coordinates to state plane?

I know there are tools that can do the conversion like pyproj, but I'm actually interested in the formula for computing it. Or if it's done with a big lookup table. I would love some information on ...
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31 views

Identifying invalid data

I extracted thousands of posts from Instagram with their coordinates. Some are very detailed (20.740.979.468.827; -99.940.974.781.912), but some are quite different (28.466.666.666.667;-16.25). Are ...
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38 views

Changing Units of a prj file in ArcGIS

I have a multipatch feature class which comes from a conversion of a IFC model. Its coordinate system is very strange ("IFC_COORD_SYS_0") and I'd like to change it to EPSG:32632. I am using ArcGIS ...
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0answers
17 views

Is there any way to convert lowrance .at5 to csv or any other readable form from genesismaps

I come to know that there are a lot of freely available lake bathymetry data in https://www.genesismaps.com/ I'm able to download those data in .at5 format. But I would like to have them with x y ...
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1answer
40 views

Determining elevation of a point from a DEM in QGIS?

I have created a series of DEMs that layercake on top of each other. I would like to be able to lookup a coordinate and get the elevation that has already been interpolated. The goal is to ...
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0answers
38 views

Labeling multiple points with coordinates?

I am working on a bridge project. I have point location of all the bridges with multiple years of project. Through ArcMap (10.3.1) I want to label (for years). Since same bridges have multiple years ...
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1answer
85 views

Making sense of coordinate systems in retrieved data from a CSW

I am invoking a CSW server (Catalog Service for the Web) and I am trying to draw the bounding box of each record in the front end of my application. One of the problems is that the coordinate system ...
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3answers
68 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 ...
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83 views

Convert Pixel / array position to global coordinates Python

I am trying to convert positions in a raster representing a .tif to the corresponding global coordinates. Converting the whole array to a tif and load it to QGIS everything is referenced fine, but ...
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2answers
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Strange coordinate shift between small-scale and large-scale Ordnance Survey vector data sets (Strategi vs. OpenMap Local/VectorMap District)

I'm trying to combine data from Ordnance Survey's small-scale Strategi data set with some of their large-scale OpenData data sets (in particular OS Open Map Local and OS VectorMap District) to fill in ...
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1answer
69 views

What is this coordinate format?

I was looking at the data posted on this page https://datadryad.org/handle/10255/dryad.83330 The readme file says that the coordinate column is given as Coordinates (UTM, midpoint): WGS84 32V ...
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2answers
155 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 <- "~/.../...
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1answer
23 views

Using ArcPy SeachCursor in Point SHP to define new variable made of point coordinates?

I have a polyline, and I am trying to extract the endpoint x,y coordinates to define them as variables. For example, if I want to define as PtA = 551799.478099, 3762853.77587; and PtB =561687.918363,...
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1answer
77 views

Converting Coordinates from wgs84 to UTM? [closed]

I have a geographical (longitude/Latitude) coordinates and i want to Convert it to UTM. 11° 13' 47.034 N , 125° 1' 30.492" E Can anyone help me?
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1answer
314 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 ...
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1answer
50 views

How to obtain X & Y values of a projected point shapefile? [closed]

I know how to add X and Y coordinate values of a shapefile to the attribute table. Now I would like to know how to achieve the coordinate values (in m) from a projected shapefile? I am working with ...
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1answer
55 views

Shapefile not showing up in QGIS, and doesn't give coordinates in (Lat, Lon) in R [closed]

I am attempting to find the coordinates associated with the Traffic Analysis Zones from this survey. When I open it in QGIS it shows up on the sidebar as a point, not a block, and when I open the ...
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1answer
197 views

Calculating slope/gradient from longitude and latitude

I've recently got some field erosion data. The only geographic data I have is the (lon, lat) (in degrees). I need to plot the erosion against the slope, however, I do not have the slope yet. Is it ...
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2answers
92 views

Coordinate reference system transformation

I am looking to transform the CRS of the geometry from my initial shapefile data to standard lat-long coordinates - espg 4236. Here's the geopandas dataframe: I wrote some script below that ...
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1answer
47 views

QGIS Print layout map coordinate works wierdly

I set the coordinate as usual in QGIS, with coordinate grids. But the output has all the coordinates stacked at edges.
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1answer
1k views

Create a polygon from coordinates in GeoPandas with Python

I was trying to create a simple Polygon from a list of coordinates and export it to multiple formats (including shapefile and GeoJSON) and wanted to automate it using Python. There were some good ...
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0answers
27 views

Inconsistent origin when using GDAL translate to generate worldfile

Did anyone here face the issue of inconsistent worldfile generated from gdal_translate? Currently I am converting a geotiff file to jpeg, in the process also generate a prj and jgw file (jgw file is ...
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1answer
31 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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2answers
84 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": { "...
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0answers
192 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.
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39 views

API or lib to convert boundary boxes or single long lat to quadtile?

I would like to store geo coordinates as OpenStreetMap quadtiles. Is there more doc somewhere than in the link above? Are there standard solutions to convert long / lat points and boundary boxes into ...