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.

learn more… | top users | synonyms

0
votes
0answers
138 views

How to write a signal for 'QgsMapCanvas::xyCoordinates (const QgsPoint & p)'

I am very new to QGIS and python. I am writing some python codes and I want to capture the x,y coordinates when the cursor moves on the map layer. (same as the coordinates show in the QGIS status bar) ...
0
votes
1answer
94 views

How to access the map coordinates show in QGIS status bar?

Is there a way to access the map coordinates show in qgis status bar? I found only this, iface.mainWindow().statusBar().currentMessage() But I know it's not the way. Or is there any way to capture ...
0
votes
1answer
182 views

How to convert gps receiver native format to google lat long or XY format

I have received some GPS co-ordinates in the following format like - "17267690N 078279340E".. How to convert the co-ordinates to show it on Google map.
2
votes
1answer
355 views

How to get the First and Last Point coordinates of a Polyline with Field Calculator in ArcGIS10

I'm trying to get the First Point coordinates (x,y) and Final Point coordinates (x2,y2) from a polyline in ArcGIS 10 with the Field calculator. I've added 4 (double) fields like StartX,StartY,EndX ...
0
votes
3answers
555 views

Get Coordinates of selected item on map using ArcGIS Engine

I have IFeatureSelection. Then select from it items by QueryFilter. How can i get coordinates of selected item? (If there are more then 1 object, then select first)? Selected item is Point in ...
1
vote
1answer
174 views

Get Coordinates of Voronoi Polygon Vertices [duplicate]

Is there any chance to get the exact coordinatas of the voronoi polygons? I am using Qgis software and I have the "center" (redpoint) of the polygons and I would like to export the polygons corners ...
3
votes
2answers
835 views

What kind of coordinate system is this?

I have a csv with a list of the world sea ports and their coordinates. The coordinates are in this format: 5234N 00226W How can i convert this to decimal Latitude / Longitude ? Data source
2
votes
0answers
39 views

Decimal degree coordinates: how many decimal places to use for …? [duplicate]

When using coordinates in decimal degrees, how many decimal points actually make sense? For example, say one is producing a table of locations of base camps in a report, there's no point in ...
0
votes
0answers
36 views

Need help with the creation of add-ins for arc map

How to find the coordinates x and y of the point when you click on the map? I'm creating a new add-in to the arc map. When you create the add button and I chose dockable window. In dockable window I ...
1
vote
2answers
268 views

Calculate actual Landsat image corner coordinates to derive azimuth (heading)

This is the continuation of an unsolved problem I had (see this thread if you like). I have a Landsat image and I would like to estimate the satellite azimuth for my location. As the satellite follows ...
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
359 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
35 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
59 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
37 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
2k 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
809 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
65 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
617 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
81 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
74 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
822 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
107 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 = ...
14
votes
4answers
24k 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
258 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
270 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
102 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
815 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
84 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
170 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
366 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
225 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
203 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
274 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
228 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
43 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
112 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
243 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
790 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
120 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
77 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 ...
1
vote
1answer
141 views

Get XY value from TiledMapService Layer Tile

I have an ESRI TiledMapService layer and I have attached an event handler to the TileLoaded. Given the level, row, and column, how can I get the envelop of the tile in map coordinates? I'm using the ...
0
votes
1answer
50 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
155 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, ...