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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.

2
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1answer
25 views

How to identify unknown coordinate type and convert to lat/lon?

I have some coordinates from an old Oracle database (AMANDA) and I don't recognize the format. For example, converting these coordinates: 3109020, 10114224 Should result in a point near latitude, ...
2
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3answers
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Extract coordinates of segments in raster from TIFF image

I'm working with the attached tiff file and I am trying to extract the xy coordinates of the green lines. so far I saved the image as raster stack, and this specific image is from a layer of that ...
3
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1answer
25 views

Converting from custom projection northing/easting coords to lat/long in decimal degrees

I've got a custom projection file that's applied to all data (per request of a client), and another team is requesting ids/coordinate pairs for assets. I tried ripping out X/Y off the point data, but ...
3
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1answer
39 views

Get Lon / Lat of a top left corner for geometry in Google Earth Engine

I want to extract latitude and longitude of a top left corner of a bounding box (bbox) for my geometry (aoi). How do I do it in Earth Engine (preferably using server-side methods)? I guess, it ...
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1answer
32 views

Exporting full UTM coordinates

I want to export my point layer as CSV with the point coordinates as "xy", QGIS does the job quite well. One problem arises though, and that is that the Easting UTM coordinate is lacking the first two ...
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1answer
33 views

Intersection function returns multiple coordinates

I am trying to find intersection vertices of two polygons defined below PG = Polygon([(0.0,0.0), (0.0,4.0), (2.0, 0.0)]) QG = shapely.affinity.rotate(PG, 10.0, origin="centroid") print(PG....
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1answer
18 views

Find intersection vertices of two polygons

I have defined two polygons and I can find whether they intersect or not. I need to find the intersection vertices if they intersect or not ? How can I do that ? p1 = Polygon([(0,0), (1,1), (1,0)]) ...
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1answer
25 views

Wanted coordinate grid [closed]

I am currently using the latest qgis and arcgis software and would like to know if someone can provide me the steps on how to create the following: 1.A blank drawing showing coordinate grid 500’x500’ ...
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1answer
55 views

Changing coordinates of points in the Attribute Table in QGIS

I have a shapefile. Within the shapefile, there are approximately 500 points. I want to change the coordinates of these points in the Attribute Table. But there is no coordinate column in Attribute ...
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0answers
22 views

Aligning Vector Data with Basemap in QGIS?

I have been having difficulty aligning my vector data (Suitable Polar Bear Den Habitat...) and the streams on the basemap. The vector data is offset slightly eastward. My hypothesis is this is a ...
1
vote
1answer
52 views

How to draw a line with OpenLayers by clicking two points?

I've got website with OpenLayers tile layer. I am trying to draw vector line on the map (only one segment between 2 points) on mouse click and to get coordinates of these two points. I read a lot on ...
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1answer
40 views

Finding precision of polygon in Leaflet? [duplicate]

In order to convert coordinates to geohash I need to know the precision as well but unable to figure how to do so.. Any suggestions? ** EDIT ** What I try to do is to find the precision in leaflet ...
2
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1answer
40 views

What is WMTS' ScaleDenominator?

I am trying to write a program which will render tiles from EPSG2180-based WMTS server. Given coordinates of a point (WSG84 or EPSG2180, I can convert from one to another) I want to render a tile ...
3
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0answers
60 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 ...
2
votes
1answer
142 views

Creating square buffers around points using shapely? [duplicate]

I am trying to create square buffers around given points, I am able to create circular buffers but how do I create square ones? from shapely.ops import transform from shapely.geometry import Point ...
0
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1answer
31 views

Get coordinate value displayed at the buttom of qgis window with pyqgis [duplicate]

Does anyone know how I can get the coordinate value displayed at the buttom of the qgis window? I have been searching through the qgis api but am not able to find anything suitable..
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3answers
59 views

Calculating the shortest distance coordinate to vector layer

I want to calculate the nearest distance from each coordinate in a vector layer containing more than 17 000 coordinates to another vector layer. I tried the GRASS v.distance tool but it gives the ...
0
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1answer
29 views

Adding columns with easting and northing of points using ArcMap?

I've got LSOA dataset with centroids weighted by population. What I am trying to do is get coordinates of those points (centroids) so that I can then calculate distances to centroids outside of ArcMap ...
1
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1answer
60 views

View Angle Calculation

In Calculating View Angle? the accepted answer contains the following calculations: Given two points (x,y,z) and (x',y',z') in an earth-centered coordinate system, the vector from the first to the ...
-1
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1answer
27 views

Seeking New York Neighborhoods Boundaries?

I need a source of New York neighborhoods boundaries coordinates, I need to draw polygons around them just like this page is doing to Wingate, Brooklyn. https://www.exrny.com/listings/121719/2-bed-in-...
1
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1answer
44 views

Converting Point Feature to Latitude/Longitude Coordinate and GPX?

I drew a point feature using the draw tool in ArcMap on a map in an area of interest. I am now interested in extracting the actual latitude/longitude of this point in geographic space so I can ...
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0answers
18 views

Separate interstate and non-interstate roads from a given route

I have direction steps from city A to city B (obtained from Google Directions API). I need to differentiate the interstate road distances from non-interstate distances in the route. Google ...
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2answers
64 views

QGIS: How to store the GPS coordinates in the attribute table? [duplicate]

I got vector points on a map. I already have the elevation information in the table for each vector point and the point-id. Now I want to get the GPS coordinates for each point stored in this ...
2
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1answer
51 views

Excel co-ordinate file to polygon shapefile

So I am making a map of fishing intensity. Currently, I have an excel table with the mid-latitude and mid-longitude for each of my intensity data points. I also have the c squared value for each point ...
2
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0answers
82 views

Transform coordinate from rotated lat/lon to normal lat/lon WGS84

I have acces to an OPeNDAP service that allows me to peek into a humongous ocean wave dataset. It takes latitude and longitude as inputs (in fact even a range of the two) - but the coordinate system ...
4
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2answers
98 views

Generate a GPX file that matches a road network from an imported drawing

I'm looking for a tool that'll help create a GPX file which will help me run a track and create "GPS Art" or "GPS Drawing". I would like to draw simple shapes, like animals or texts by following a ...
4
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1answer
40 views

Separating points with identical coordinates using ArcPy?

I need to move apart points with identical coordinates. I have a point layer where there can be as high as 4 points on each other (same coordinate). I want to separate these points from each other (...
0
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1answer
57 views

Manually edit shapefile coordinates (polygon) QGIS 3

In the QGIS2.18 version I was used to see the point editor table when I would be in editing mode and have clicked a point. A list would appear, with all the points in the selected polygon and their x ...
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0answers
31 views

How to get the Lat/Lon coordinates if I am given a table of the MINxy and MAXxy, so that I can map it out in ArcMap?

Right now I have a table that looks a little like this: and I have the geographic coordinate system they were mapped in, but I need to display them as the polygons that they are in ArcMap.
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0answers
31 views

Getting authentic and verified current location of user?

I am building an application that needs a user to send his current location. However, since GPS signals can be faked. I need the user current location to be authentic and verified. I thought of ...
0
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1answer
16 views

Determining WSEN of desired geographic area?

I'm looking to create a map of Afghanistan and I am in the middle of resampling binary geographic data into topojson format. The trouble is that my research of WSEN borders has returned nothing and I ...
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0answers
20 views

Convert MSL to WGS height

I need to find the coordinates for a given location in WGS coordinates. This mean geodetic latitude, longitude, and altitude (with respect to the reference ellipsoid). I was informed the coordinates, ...
0
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1answer
40 views

Obtain pixel coordinates of an image

I'm working with a tiff image in arcgis projected in UTM 33N and I need to obtain pixel coordinates of a specific point in the image with known metric coords (UTM 33N). How can I get them?
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2answers
431 views

How are satellite images mapped to terrain coordinates so precisely?

Many geoinformation systems have both satellite images and terrain features (houses, roads, etc) with coordinates. So they can show terrain features drawn over the satellite image or they can display ...
0
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1answer
39 views

Converting local coordinates to UTM 36N by control points in QGIS?

Our project is generating local excavation data from a local grid which we eventually want to transform from the local coordinates to real world coordinates. In this case we want to convert/translate ...
0
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0answers
37 views

Adding old FID to new feature class using ArcMap?

I have been tasked to relocate some assets, about 1000 preexisting point and line feature classes. I will be collecting the correct GPS coordinates to realign all the assets but I'm not sure how to ...
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0answers
14 views

Need to convert coord_dimension from 4 to 2. File contains 2D polygons

I am working with PostGIS Bundle 2.5 in PostgreSQL 11. I loaded a MultiPolygon file from a geodatbase and I need to append the geometry table to an existing geometry table. However, the coordinate ...
0
votes
1answer
117 views

Extract longitude and latitude from object in shapefile

I'm new to GIS and (ESRI) shapefile. I would like to extract GPS-Coordinates or longitude and latitude from every object in a shapefile, mainly from polygons. Here is a picture with one of these ...
0
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1answer
73 views

Converting data from parliamentary constituency code/county code to a mappable format?

I have a spreadsheet detailing fuel poverty in the UK, against a) individual parliamentary constituencies b) county and c) local authority. This can be found here if anyone needs to look: https://www....
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1answer
52 views

Displaying bounding box polygon from CSV using ArcGIS Desktop?

I have a data file (.csv) with a minimum and maximum longitude and latitude. These 4 fields (roughly a few thousand rows) make up a bounding box. However, I am unsure of how to get this data to be ...
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0answers
37 views

How do I extract coordinates for a line

I have a set of 35 lines that I need to collect the exact coordinate string for in the format txt. I would like to export the coordinate from every vertex the lines are built up by, and I would like ...
0
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1answer
88 views

Map Coordinates have negative values

I have created a map in QGIS with 4 vector layers with the CRS of (EPSG:28356, GDA94 / MGA zone 56) The map is of the Robina area on the gold coast Australia. I have added map coordinates and the ...
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0answers
27 views

Esri grid raster to GPS coordinates

I have a digital terrain model and a digital surface model which contain data in an Esri grid. The data in this files looks like this ncols 1251 nrows 1001 xllcorner 742499.5 yllcorner 328999.5 ...
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1answer
48 views

Get some sample coordinates inside an area using its KML file [closed]

I have a KML file which defines an area. I want to get coordinates of some points inside that area using my KML file. I googled a lot, but I only found codes to check if a point is inside. My issue ...
0
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1answer
28 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
133 views

How to truncate coordinates (LonLat) to decimal precision - OpenLayers 2

For eg. if coordinates are 17.12345678, -82.12345678, And I want to convert them to 3 decimal digits Expected result: 17.123, -82.123 Is there any API in OpenLayers 2 to truncate coordinates (...
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1answer
36 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 ...
2
votes
2answers
667 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 ...
2
votes
1answer
50 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 ...
3
votes
1answer
75 views

Interpreting cell coordinates from DEM?

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 ...