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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3
votes
1answer
36 views

Challenge: Descrambling scrambled coordinates

I know challenges are more common on the coding-related Q&A sub-sites. But here we go: I've got a dataset that comes with coordinates, however they seem to have gotten scrambled somewhere along ...
0
votes
0answers
20 views

How to add coordinates to an image in QGIS? [duplicate]

I use QGIS 2.10. I have a map image without any coordinate or boundary info. I need to convert it to kml file and before this, I need to add specific coordinate info for this map. How can I add ...
0
votes
1answer
36 views

Points and polylines representation of coordinates in QGIS? [duplicate]

I am working on the "Jakarta Bay", Indonesia. I have a shapefile for the Indonesian coastline and I clipped my region of interest using an appropriate polygon. I also have points that are located ...
0
votes
1answer
29 views

How do I color XY coordinates with different colors in ArcGIS for Desktop?

I have added XY coordinates on map layers in ArcMap. These coordinates now show up as points. However, I want to be able to color each coordinate point a different color. Any tips/explanation?
1
vote
1answer
27 views

Postgis How to populate column with geography data from geometric data?

I stored my point date in geometry format with SRID 4326 supposed EWKB (data looks like this "0101000020E610000071F1A611E9392640AECD10D8E68C4A40") = way geometry(Point,4326) I want to have the ...
1
vote
1answer
32 views

How to calculate overlap area of two polygons?

I am a beginner in the world of GIS. I have one table polygons with each polygon having north-east and south-west coordinates. And for every polygon, I need to find area of overlap with other ...
2
votes
1answer
37 views

XY coordinates effecient way to copy

I get XY coordinates of point features delivered to me in PDF format, this means that to bring them into ArcGIS I manually have to enter them first into an excel spreadsheet - does anyone know if ...
0
votes
0answers
19 views

Layer coordinates and geometry in ArcGIS API for JavaScript?

Currently I'm working on a system that uses the ArcGIS API for JavaScript with layers and map to display information on borders of specific regions. I don't want to display all information at once ...
0
votes
1answer
31 views

Arithmetics with Coordinates [duplicate]

I wonder if I can do simple arithmetics with coordinates. Can I do substraction of coordinates like 2.570801 (lng) 46.89023 (lat) / 17.424316 (lng) 55.15377 (lat)?! Or will that get messy without a ...
2
votes
2answers
43 views

Finding the pixel coordinates using GDAL/numpy

Is there a way to get the XY cordinates of a pixel based on the array index using numpy/gdal? I have a new set of extents for a raster and, based on these newer extents, want to determine the ...
4
votes
1answer
66 views

Find shortest path between points avoiding shapefile?

I am an intermediate python developer with very limited GIS experience. I have a list of latitude/longitudes of a ship at sea. I need to join them into a polyline using the shortest distance between ...
1
vote
0answers
31 views

Opening shapefile and Tiff layer Coordinates do not match up

I am new to using QGIS and am having a major problem. I have the UK Ordnance Survey (OS) 1:25000 raster layer in Tiff format open. When I open a shapefile or mapinfo vector layer on top of it the ...
0
votes
3answers
32 views

find border coordinates of brazilian states

I am looking for coordinates (longitude and latitude) of each state of Brazil. Where can I find that? I have found a file for the US states here: http://econym.org.uk/gmap/states.xml, I am now ...
0
votes
2answers
41 views

Add X,Y coordinates to a shapefile

I have x,y coordinates as excel file. How can I add them into ArcMap? Or - I have x,y coordinates of 2 points. How can I quickly find them AND add/draw them on the map in ArcMap?
0
votes
1answer
19 views

Find the most populous city within regular hexagon

I have a map of europe as hexagonal grid. For each hexagon I have center(lat and long) and constant size. Is there a way to determine the most populous city within each hexagon? It may not be ...
1
vote
0answers
6 views

NBI Coordinate Data Missing place-holding zeroes for DMS format

When working with National Bridge Inventory (NBI) coordinates I have found what appears to be an error in the raw data provided. I couldn't find any other mention of this specific error when ...
-1
votes
1answer
101 views

How to get all vertex lat, long coordinates every 1 meter between two known points using php

I am currently using php to try and write code that will take a start point and end point latitude and longitude coordinate pair in decimal degrees and calculate the latitude and longitude of every ...
7
votes
1answer
145 views

Coordinates of cities and villages in The Gambia/Senegal

I am looking for sources of geo-referenced data on villages and cities (or all other things there are) in The Gambia (and Senegal if available). One issue with geocoding in rural West Afrika is the ...
2
votes
0answers
42 views

GTA V coordinates to LatLng

I'm here because I'm trying to create a GTA V map with Leafletjs API. In deed, I've got my tiles that are ready. But the aim is to put markers on the map by using GTA V in-game coordinates. To achieve ...
1
vote
0answers
32 views

Schematic Map in GIS Tools?

The Question: Is there way to leverage GIS tools to author/edit a schematic map where elements' geometries has canvas-based coordinates rather than real-world coordinates on Earth? Perhaps to ...
0
votes
1answer
64 views

Problem doing a coordinate transform with GDAL python

I'm trying to do a concordant transform from the format of the shapefile (3309) to google maps(4326). This code works on one Centos 6.6 box with the SCL python 2.7 and a custom gdal 2.0 build. ...
0
votes
0answers
42 views

Coordinate transformation fails in QGIS

I am new to qgis, so this maybe a simple problem, but I don't know how to handle it. I have two layers: One layer is based on WGS84, the other on Gauss-Krueger zone 3 (GK). How can I successful ...
2
votes
2answers
74 views

How to calculate the distance between a line and a point (using lat/lon coordinates)

In my Android app, I need to calculate the distance from a point (the device's location, which is a lat/lon coordinate) to a line (defined by two lat/lon coordinates), and get the result in meters. ...
1
vote
0answers
27 views

Finding specific area with coordinates out of a lot of LAS data?

I would like to extract spatial data out of a great amount of LAS data. Unfortunately, there is no index or sth that could help me find which file is for what area. Also, it is not possible to ...
-1
votes
1answer
46 views

How to assign a XY coordinates into a bunch of points in Qgis [closed]

I have a bunch of points without XY coordinates, and it is a global point dataset. This dataset is a 1*1 grid in a 400*800 dimension. It is quite obvious that each point has specific XY coordinates, ...
-2
votes
1answer
38 views

Where's the mean center of the contiguous US population? [closed]

I can find 1790 to 2010 and an estimate for 2014 but Alaska and Hawaii are included after they became states and I wonder what it is without those states' extreme distances skewing the average. I ...
1
vote
1answer
25 views

Right coordinates for data defined position of diagrams

I'm using QGIS 2.8.2 and want to define the position of diagrams with x and y coordinates. The same thing works with the labels, but when I define coordinates for the diagrams they just disappear. ...
2
votes
1answer
18 views

Qgis load a set of excel points into a googlemap with only one point with real coordinates

I am working with a google map on which I want to attach a grid of five points. Only one of them has real coordinates in the centre, point O ( 8.32688E, 48,32933N). For all the rest only the excel ...
1
vote
1answer
50 views

SharpMap Coordinate transformation Problem

Hey guys 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 ...
0
votes
1answer
56 views

How to measure distance between two coordinate pairs taken from NMEA file?

In order to measure momentary speed, first I need to measure the distance between two pairs of coordinates. That's where my lack of knowledge stops me. I have example data in NMEA format: ...
1
vote
1answer
51 views

How to get the coordinates inside the polygon using python

I have a polygon and using this code snippet we can get the coordinates boundary of the polygon. canvas = qgis.utils.iface.mapCanvas() aLayer = canvas.currentLayer() coord = ...
0
votes
0answers
23 views

Openlayers-3 setCenter is not working

I'm trying to set the center (setCenter) of the map from a JSON coordinate that comes in form Genomes using ui.autocomplete. I'm using the openlayers default proj of EPSG:3857, so to get the ...
2
votes
1answer
26 views

How to find the coordinates of the intersection points between two SpatialLines objects (or SpatialLines and SpatialPolygon edges)

I am try to find the co-ordinates of points where SpatialLines cross the edge of a SpatialPolygon. I have searched and searched, but can only find results such as over which tell me which lines cross ...
1
vote
1answer
25 views

Capturing coordinates via snap with QGIS

I would like to know if there is a way to get and extract the coordinates of a node (one of the node that conforms a polygon) in order to use these pair of coordinates to georeference a DXF file, ...
0
votes
0answers
36 views

Leaflet - Getting tile border coordinates

Displaying grid borders is fairly easy with CSS or adding an image like this: The result is a map like this: However, I'm having a hard time trying to get the coordinates of those tile borders. ...
2
votes
1answer
34 views

Is nearest search done on Euclidean plane accurate

I am writing a program which will find all the points within 1km. I am planning to to do this on a Euclidean plane as my database only supports Euclidean plane or sphere indexing ...
3
votes
1answer
56 views

Point Coordinates Conversion with unknown system

I've been using QGis for few weeks now. Although this site always came very helpful, I can't find solution to my recent problem: I have few points, and know their coordinates in "WGS-84" and "ISN-93" ...
10
votes
2answers
211 views

How to create dynamic leader lines?

I'm trying to create dynamic leader lines by using a PostGIS view in addition to the QGIS „Move Label“ tool. CREATE VIEW leader_line AS SELECT gid, ST_MakeLine(geom, ...
2
votes
0answers
50 views

How to access Leaflet EPSG:3857 coordinates?

I read everywhere that Leaflet is internally using a spherical web mercator (EPSG:3857), but whatever I try I get either Lat/Lon (EPSG:4326) or strange coordinates I dont understand: ...
0
votes
0answers
19 views

Estimating world position of origin of coordinate system based on its members global position?

I have n points of interests (POIs). I have a local coordinate system. For all these n POIs I know there position in this system, that is there x, y, z translation (local position) from origin of ...
1
vote
1answer
41 views

Converting grid co-ordinates to GPS co-ordinates

I need to convert grid co-ordinates from an old document to GPS co-ordinates that I can plot into Google Earth and ArcGIS. Here are the instructions: 'It was unfortunately not possible to produce ...
2
votes
1answer
40 views

How do I make a hexgrid in QGIS with cell identification numbers

I'm getting started with QGIS as part of my interest in military science and wargaming. I'm running into a problem adding identifiers (column and row) to the hexcells that I've created with mmqgis. ...
-1
votes
1answer
152 views

Convert xy coordinates to latitude & longitude

Is there an easy way to convert coordinates (TM65) to latitude/longitude using ArcMap (version 10.3.1)?
2
votes
1answer
55 views

Adding QGIS feature, that shows coordinates and scale, into a custom application

I'm writing a standalone application using PyQGIS and I'd like to add the QGIS feature that shows coordinates and scale as the cursor hovers over the map. I need to know this mainly in case of ...
6
votes
3answers
136 views

Waypoints with coordinates in R

I have a SpatialLineDataFrame with 20 observations of 4 variables (in WGS84). I want to create waypoints every 10 meters. Every waypoint will has the x y coordinates. I tried to do it manually like: ...
3
votes
2answers
70 views

How to place coordinates points on a vector layer?

I have got GPS coordinates collected from a number of farms in my country (Malawi). But when I plot these GPS coordinates on a vector layer (my country map) using QGIS, the points are falling outside ...
0
votes
1answer
48 views

Output of Add XY Coordinates?

I am trying to get the coordinates of the coastline. I have made a shapefile with points selected along the coastline, the coordinate system I have the shapefile under is WGS 1984 UTM Zone 30N. I have ...
0
votes
0answers
51 views

H2GIS and POSTGIS

i use PostGIS and H2GIS and i have tested ST_Transform function on both systems: SELECT ST_AsText( ST_Transform( ST_GeomFromText('POINT('||to_char(5873455.6,'9999999.99')||' ...
1
vote
0answers
75 views

extract x-y from a point created from lat/lon coordinate

Using QGIS 2.8.1, how can you create a point in WGS 84 using a lat/lon and extract X and Y value of this same point in CRS UTM34N. For eg, you have been given a lat 20 deg and lon 50 deg. Create a ...
0
votes
0answers
14 views

ArcByCenterPoint - coordinates of start/end points [duplicate]

Given an ArcByCenterPoint, defined by: center position (lat,lon in WGS84) radius (meters) startAngle (degrees) endAngle (degrees) how can we compute the position (lat, lon) of start/end ...