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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69 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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27 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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57 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
144 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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1answer
136 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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1answer
97 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
209 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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314 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
34 views

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
76 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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2k 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
28 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
819 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
1k 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
57 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
58 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
683 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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133 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
110 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
9k 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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46 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
45 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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3answers
307 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
325 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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54 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 ...
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2answers
725 views

Surveys showing GPS accuracy in different models of smartphones?

Are there any surveys that give accuracy in meters for different smartphones (e.g, iPhone 6: 8 meters, Samsung Galaxy S8: 7 meters) regardless of what the statistical method is being used?
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34 views

How to find for which segment belongs this point?

I'm using an OSM dataset of Chicago which contains longitude and latitude of the source and the target of each segment road. I want to find the point with coordinates equals to: POINT (-87.7439318058 ...
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3answers
370 views

Querying Geospatial data in Athena database, getting rows in range of 5 miles from specified coordinates

I have database table Building with these columns: name, lat, lng How can I get all Buildings in range of 5 miles from specified coordinates, for example these: -84.38653999999998 33.72024 ? ...
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1answer
46 views

Detect coordinate system from dataset

I've been provided with a dataset containing some coordinates, but I don't recognise the coordinate system used. They look like standard UTM coordinates but the values don't match up with what I ...
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3answers
54 views

Getting coordinates to display properly when imported from excel into ArcMap?

Both the base map and the table imported have been put to same coordinate system. Is only showing a single point at a wrong location for all points. When I click "identify" for the single point it ...
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52 views

Moving a feature to a new XY coordinate

I know how to move a point feature to a new location based on an updated XY coordinate. For example, joining an Excel or dbf table with the new XY cords to the production feature class attribute table ...
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2answers
753 views

How are the coordinates for multipolygons arranged?

How are the coordinates for a multipolygon (i.e. polygon with a hole in it) arranged? Do shapefiles and geoJSON files always save the coordinates for the outer ring first? I'm asking because I ...
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50 views

Create x,y points with a radius that best fill a polygon

I am looking to best fill a polygon with non-overlapping circles of a specified radius and then extract the x,y points from a table. Is there a way to do this in MapInfo without specifically picking ...
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1answer
447 views

Displaying markers within viewport for different country in google map?

I have multiple location. One is from Netherlands and one from India. How to display both country marker in google map view port? Currently only Netherlands markers are displayed. So I have to drag ...
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2answers
76 views

Copy and paste certain cell characteristics of +500 cells in Excel at same time to create polygon shapefile? [closed]

We have this dataset with over >500 areas for which polygons are made. We don't know with which GPS these coordinates are registered. What we have is the Excel file with two columns. Cell A: "area ...
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225 views

Add gridlines to projected map in R

I am producing some maps to include in a publication. However, I am not able to include a graticule on my plot such that it resembles that in the image shown below. The image is projected but still ...
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1answer
33 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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61 views

EPSG Geodetic Parameter Registry - SW supporting transformation EPSGs

The page www.epsg-registry.org contains EPSG codes for different transformations (i.e. EPSG:1173, EPSG:1244 etc.). Do you know about some GIS SW (online or desktop), which supports converting ...
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2answers
743 views

How to create a polygon from Excel coordinate file

Currently I have an Excel file with 2 columns. area number. coordinates. The coordinate column contains several X and Y points those are seperated with a comma. Next an example how the points are ...
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1answer
71 views

Problem with coordinates not being calculated in decimal degrees

I have a qGIS question regarding the calculation of x and y coordinates and showing the results in decimal degrees. Initially I was using the 3.2 version, but went back to the 2.18.13 version because ...
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2answers
124 views

Programmatically extract edge points from many polygons?

Objective: Extract the four Latitude, Longitude points which correspond to the corner edges of each polygon in the Military Grid Reference System (MGRS) shapefile. How can this be done in QGIS? In ...
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29 views

Checking if road passes through a trapezoid?

I have a straight road defined by 2 points with latitude and longitude. I also have a trapezoid defined by 4 points with latitude and longitude. How do I check if the road passes through that ...
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1answer
70 views

Copying all coordinates at once in QGIS?

I had a line with points and I want to get all of its coordinates by once, The only way that I can copy the coordinates by this step (Identify feature> right click the point that I choiced ,copy ...
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134 views

How to transfer UTM coordinates to Euclidean coordinate system?

I get the coordinates of objects in the UTM format: "coordinates": [ [ 4631430.35, 396976.54 ], [ ...
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1answer
81 views

Adding XY Data to ArcGIS 10.4

Apologies I have seen similar questions and read the responses but did not understand any of the answers even after reading them several times closely, including this one. I am adding XY data to an ...
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1answer
201 views

Converting coordinates in metres to Longitude & Latitude (CRS conversion) in OGC WKT format?

I have two tools that produce output in OGC WKT format. But they look different. Could you please explain this(I am very new to GIS). For my project I want the coordinates in the second format. Is ...
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1answer
148 views

Converting NZ Topo50 Grid Reference to WGS84 Lat/Long

newbie here so please pardon me if I'm asking a silly question. Currently I am required to work with Lat/Long coordinates in WGS84 (EPSG:4326) on QGIS for data analysis. The input data I have comes ...
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1answer
207 views

Script to get coordinates of selected polygons (country borders) - in QGIS [closed]

I'm new to qgis, I just need to retrieve from the selected polygons their coordinates list. I want to use python's console with a script. I'm using QGIS v3 This is a sample of my bare attempt to do ...
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2answers
54 views

Manually editing y-coordinate in ArcGIS Desktop?

I am trying to export dwg files in ArcGIS to a shapefile. My problem is that the y-coordinate is 500000 although it should be 3500000 because the dwg file is made to a coordinate system called Finnish ...
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1answer
485 views

Extract and sort x coordinates in groups from a column to a new one in geopandas?

I am working with geopandas There are these columns:geo,cat and I have to make the new column called rank. rank should contain according to the groups with the similar cat number an increasing ...