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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8
votes
4answers
3k views

How to use Z-Coordinate in QGIS?

I was mapping an area in Namibia and also tracked a lot of paths on my way with my Garmin device... so I thought it would be nice to see height differences in my area (esp. interesting in the ...
1
vote
1answer
465 views

Rotating the coordinates of a layer by 90 degrees

I have got a dwg file with the plans for a building, with rooms and everything. (There's been some samples taken inside the building which I want to display.) Now, since it's of a building, the person ...
2
votes
3answers
1k views

how to extract a rectangle corner coordinates in python script

i want to extract a rectangle corner coordinates of a shape file in python script..please suggest me a solution. Thanks in advance, Bhavya
0
votes
2answers
38 views

Recommended way to explicitly distinguish 2D from 3D locations

In strongly typed object-oriented programming environment, I want to make an explicit distinction between two types of Locations: One type would be 2D (along Earth surface), thus having Latitude and ...
1
vote
0answers
62 views

Finding X,Y off of PDF and input into shapefile [closed]

I have this as the Point of Beginning for a legal description (mineral deed) X,Y (X= 2,614,055.44 and Y= 481,876.17). I did the ADD X,Y with the coordinates at WGS1984. It shoots way off course even ...
0
votes
1answer
40 views

How to create segments/lines by inputting coordinates

I have a set of coordinates and I wisht to recreate them in GIS. Basically, I am following from a paper based sketch map of maritime delimitation.
-1
votes
2answers
3k views

Convert geometry to latitude-longitude using PostGIS ST_Transform

My table has a geometric field, in EPSG:3857, of type point. I need the latitude and longitude, in EPSG: 4326, of each point. Could someone give me a valid example of how to use ST_Transform().
3
votes
3answers
914 views

Converting coordinates: Feet to Degrees-Minutes-Seconds

I have a point shapefile and I want to get the coordinates for each point in Degrees-Minutes-Seconds format. When I use Add XY Coordinates (Data Management) it gives me the coordinates in Feet format. ...
3
votes
0answers
66 views

Given distances from two locations how to accurately find geographic coordinates [duplicate]

I am working on a research problem which requires me to calculate a geographic location accurately (with error distance of few meters), given distances from two geographic locations. For instance: ...
2
votes
1answer
780 views

What is the range of numbers for coordinates in geographical coordinate systems

Up to now I thought the range of values in the geographic coordinate systems was: Latitude (S-N): -90 to +90 Longitude (W-E): -180 to +180 I have set the coordinate system of my ArcGIS data ...
3
votes
1answer
83 views

Help identifying a coordinate system

I have some "latitude" and "longitude" data that describes the Silverstone motor racing circuit in the UK. The coordinates look something like this: latitude longitude +03124.27986 +00061.07652 ...
0
votes
0answers
76 views

New Feature is not Displaying

I have a feature layer on my ArcGIS for Server. I am trying to add a point based on coordinates. With the code below, I do not get any errors, but the graphic nor feature is created or put into the ...
1
vote
2answers
989 views

How do you convert to degrees and minutes from 8/9-digit lat/lon DMS code? [duplicate]

I'm trying to map the national bridge inventory, but the coordinates are stored in this 9-digit code for longitude (and 8-digits for latitude) EXAMPLE: Longitude is 81°5.8' Code is 081054800 Page 9 ...
0
votes
1answer
110 views

How to get from Lat/Lon to this format?

I have twitter data with coordinates such as: [-7.2377761, 112.73091137] I'm working with a python geo library called osgeo. The sample code indicates creating a point like this. point = ...
18
votes
4answers
28k views

How to get coordinates from geometry in PostGIS?

This line: SELECT geom FROM myLayer.geom will return a hex value, i'm wondering how would it be possible to get decimal values, a result that look likes human-readable coordination? Regards,
1
vote
1answer
311 views

How to find nearby objects using Easting and Northing range

I have a bunch of objects which have associated Eastings and Northings in format OSGB36 for example: 265397 869562 547297 179002 If I have a starting Easting and Northing, and wanted to find ...
1
vote
1answer
308 views

Calculation to convert db data to Lat/Lng degrees

In a database I have the following Lat/Lng data. I wish to convert it to a readable format. 177514245:34726053 => S 32 7.3947, E 115 51.4245 177513828:34726948 => S 32 7.3052, E 115 51.3828 ...
1
vote
1answer
108 views

MakeXYEventLayer_management not creating final file?

I'm using python to generate x and y coordinates for the start and end of lines in Arc. I have successfully done this part but when I try and generate the nodes I have no idea where the output file ...
0
votes
1answer
36 views

ESRI file coordinate confusion

I have a batch of (binary) ESRI files containing 25m resolution raster data. I need to check my interpretation of the OSGB coordinates therein. gdalinfo reports the following for a file containing a ...
2
votes
1answer
990 views

Adding graticules to the edge of the map only in QGIS

I would like to add graticules to a map, once it is in the 'print composer', on the border of the map, and not on the frame (my map insists on being smaller than the frame). I have managed to add a ...
0
votes
0answers
104 views

Transform map coordinates to page coordinate in ArcObjects

I have a map inside a page layout in ArcMap. Currently, I use this code to convert geographic coordinates to page coordinates: IMap map = ... IPageLayout pageLayout = ... IDisplayTransformation ...
3
votes
2answers
1k views

Looking for Python module to do lat lon calculations

I'm looking for a Python module that can provide some / all of the following services using latitude/longitude to define points: Distance between two points Point in polygon Distance along a ...
0
votes
1answer
200 views

MapBasic For Loop ignoring every other row

I have made a loop in MapBasic but is it only updating every other row in the table: My code works from the bottom of the table upwards to generate start and end coordinates for polyline features: ...
1
vote
2answers
420 views

Given a flight path given in latitudes and longitudes, how do I find another flight path that is parallel to the path given?

Given a flight route that is given in latitudes and longitudes, how do I find another route that is "parallel" to the route given (find a perpendicular line to each waypoint given)? I think the best ...
0
votes
1answer
280 views

Creating points based on coordinates in MapBasic

I am currently working on a MapBasic tool that generates start and end coordinates for a polyline layer. So far I have successfully populated 4 columns in a table (SX, EX, SY, EX) with coordinates of ...
1
vote
1answer
260 views

Is it possible to link a QGis project with an excel file?

I have an Excel file with coordinates and I have used this file to plot the coordinates in QGis. I was wondering if it was possible to permanently link the excel file to the QGis project, so that when ...
2
votes
1answer
279 views

Wrong lon and lat

I am using QGIS 2.2.0! I have shape file with wrong coordinates, it's had replaced x coordinate with y coordinate. For example my point feature have coordinates: 4830698,7496859 and right coordinates ...
2
votes
2answers
1k views

How to extract X Y coordinates and RGB from pixels using python in QGIS?

I'm trying to white a Python plugin in QGIS (2.2) to get, for each pixel of a raster image, its X Y coordinates, as well as, its RGB (3 bands) values. At first I opened the raster file using: rlayer ...
2
votes
2answers
277 views

Switch coordinates in linestring

I made a silly mistake: when creating linestrings in my PostGis database i inverted the lon and lat values. Which isn't a problem for postgis itself, but for my visualization and intersections. ;) Of ...
2
votes
0answers
49 views

Is it safe to store coordinates on NFC tags always in one CRS and rely on conversion for others

I'm involved in NFC (Near Field Communication) standardization of a record structure for geographic point locations. That will allow to put coordinates on NFC memory tags which can be read with a ...
1
vote
1answer
121 views

How do I add coordinates to a polygon layer to be able to sort the polygons from north to south in QGIS?

I have a polygon file, where each polygon represents one property. I want to be able to sort the polygons from north to south or vice versa. I need them to be sorted in this way when I export them to ...
0
votes
1answer
272 views

Calculating distance between coordinates [duplicate]

I would like to calculate the distances between a list of coordinates (classic GPS coord.). From coordinate A to B from B to C from C to D and so on, and so forth. Is there any program, or website, ...
5
votes
2answers
1k views

How to convert from one ellipsoid to another?

Introduction I have the following problem: I want to convert from WGS84 to "Anguilla 1957 / British West Indies Grid" (EPSG 2000). This seems to be straight-forward, as the transformation is a simple ...
6
votes
2answers
896 views

What does coordinate system WG 21° mean?

I have a land survey document for a piece of land, it contains absolute coordinates that I would like to locate on google maps, but I don't know how to correctly interpret the data. What does the ...
1
vote
2answers
2k views

From coordinates find country using Python

I have tweets with coordinates. I'm trying to bucket the tweets by country using the coordinate information. I know that I can achieve this using some hosted web services but all of these have API ...
1
vote
1answer
125 views

Defining a line from geographic coordinate points.

On a flat surface we can define any point on line which passes from point1 (x1,y1) to point2 (x2,y2) via simple trigonometry. How can we do that with latitude and longitude of 2 points? Imagine we ...
1
vote
0answers
85 views

LLA vs ECEF--which to choose?

I will be providing points in 3D to an external source via XML. One coworker suggests Lat/Long/Alt and another suggests ECEF. We can do either without much trouble. We have an existing product that ...
0
votes
1answer
51 views

converting UTM cordinates into map area [closed]

I have coordinates in UTM coordinates for 3 points. I do not have licenced ArcGIS software. Is there any available app or place on internet where , if the above 3 coordinates can be put and the ...
1
vote
1answer
177 views

OS Boundary Line shp export CSV with description and lat/lng

I have found several post saying it is possible in QGIS to export OS Boundary Line shp files to csv's containing the boundary line in lat/lng (for use on Google map) along with the name of the area, ...
0
votes
1answer
1k views

How to get Waypoints between two coordinates from Google maps or other map applications?

Suppose I have A (source point) and B (destination point), then I want to get a series of route point or waypoints between A to B from Google maps or other map applications. The result that I need is ...
0
votes
0answers
103 views

recalculate latitude and longitude from a pixel in a cropped map

i want to recalculate a geographic coordinate from a pixel in a map. For this i have the size and the coordinates from the map to convert a coordinate to a pixel is use the algorithm, you find at ...
2
votes
1answer
688 views

How can I show points on the same coordinate as e.g. a bigger symbol in QGIS?

I use QGIS 1.8 for mapping archaeological findings. Some of the findings within one layer are located on the same site and therefore have the same coordinates. Therefore you just see one point instead ...
3
votes
1answer
4k views

How to find X,Y coordinates of a single point in ArcMap 10.1?

I have a shapefile of a road layout (name: US-101). I drew a line across the road section which intersects the left and right edges of the road and pavement marking (which is also the part of ...
3
votes
5answers
3k views

How to find coordinates for a lot of locations based on the town or village name?

I have got an Excel spreadsheet with roundabout 15,000 locations, which are only identified by the towns or villages name and the country. I am intending to present these on a world map. Therefore, I ...
1
vote
1answer
38 views

Capturing GPS coordinates on the ground in Boliva?

Assuming no cellular or internet connection, what is the best way to capture GPS coordinates on the ground in Boliva? Preferably a free approach. For example, are their any android apps that can do ...
1
vote
2answers
334 views

Automatically create polygons from top right and bottom left coordinates?

I have a CSV file with hundreds of records. Each record contains 2 matching coordinates, 1) top right corner of a rectangle, 2) bottom left corner of a rectangle. Polygon ID, Lat 1, Lat 2, ...
1
vote
1answer
202 views

FME: how to extract the coordinate of the North West corner

In an FME translation from a polygon geodatabase feature class to a DGN I am trying to place a label in the top left corner of a box. I have tried using CoordinateExtractor to find the coordinates of ...
1
vote
1answer
2k views

Trasformation from ECEF to ENU

I am trying to transform a local vector rECEF from ECEF coordinate system to ENU coordinate system (rENU) where ECEF = earth-centered earth-fixed coordinate system ENU = East, North, Up coordinates, ...
4
votes
1answer
383 views

Python libraries for correlating Photo to GPX file?

Can anyone recommend a Python library(s) that can geotag a photograph with the lat/long coordinates by correlating the timestamp of the photograph to the timestamp of a waypoint within a GPX file? I ...
1
vote
2answers
85 views

qgis polygon to coordinates

I have the ordnance survey postcode polygons, i can get the centre point on the postcode (Using polygon centroids) and all the corner coordinates (using extract nodes) Does anyone know how to export ...