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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116 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 ...
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0answers
134 views

Converting custom grid to OS grid

I have two sets of data, one is in OS coords, no problem there, but the other was set out in about 50 off 10x10 metre grids aligned to a 'feature' on the ground. I do have the OS coordinates of their ...
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0answers
116 views

Extrapolate data and district names from map

My data: soil samples in each district. My question: I want to extrapolate from the soil sample's map the names of the districts in which the samples have been collected. I have already found the ...
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0answers
221 views

How to define coordinate system and geographic transformation for a CAD drawing?

I am a GIS guy and I occasionally work with CAD files as well. Now I need to know how I can define a coordinate system and a geographic transformation for a CAD Drawing. According to ESRI: "You can ...
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1answer
128 views

Insert geometric data to a column from coordinate values in double precision

Screenshot of database http://wp.me/aIW9p-i0 For table “households”, I want to create two new columns: 1) “Geom”, data type – geometry; 2) “WKT”, data type ‐ text; I am intending to do the following ...
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2k views

convert GPS to XY coordinates

if i have obtain GPS coordinates as Latitude/Longitude, then i need to convert them to XY coordinates, i see this link actually i need to get the Trilateration , in its equation i need the XY ...
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3answers
4k views

Openlayers vector feature coordinates are not transforming,

I have a OpenLayers vector with a single feature [0]. It's coordinates are in the map projection (EPSG:3413) and I want them in WGS84 (EPSG:4326) decimal degrees. I have the following code which ...
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1answer
1k views

Wrong coordinates in data when projecting in world map (qgis) [duplicate]

Possible Duplicate: How to find the proper coordinate reference system with two sets of data using different measurements or too convert one system into another I'm fairly new to the GIS ...
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133 views

Google earth incorrectly rendering coordinates?

My circles are rendering funky on the poles, and along the equator. Here are my coordinates: 158.05553767833,-78.151355482613 152.68654993135,-76.924955252783 147.72303124605,-75.713526831152 ...
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123 views

Is there a ModestMaps or other flex library for finding the distance between 2 lat/lon coordinates?

I'm using ModestMaps in my Adobe Flex application. Is there a flex library method to calculate the distance between two of my lat/lon coordinates, or am I stuck coding the Haversine by hand? I've ...
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205 views

gdallocationinfo from C++?

I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it. Where in online GDAL ...
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27 views

Translate geographical coordinate [duplicate]

Possible Duplicate: Calculating Lat/Lng X miles from point I would like to know how could I translate a geographical coordinate to an specific distance. So for example let's suppose I'm ...
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0answers
386 views

How do I convert WSG-84 coordinates to lat/long? [duplicate]

Possible Duplicate: coordinate convertion: decimal degree to deg-min-sec of lat/long coordinate I am looking for either an online tool or one that I can download to convert WSG-84 ...
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1answer
429 views

What datum (reference ellipsoid) does Nasa Worldwind use?

What datum (reference ellipsoid) does Nasa Worldwind use? I can't seem to find where Nasa Worldwind tells explicitly what datum they use. I need some sort of valid link.
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3answers
5k views

Get geometry from coordinates

I have a table with geometry column called point, saved in SRID 4326. I want to get the geometry by its coordinates, but something didn't work. I suspect database configuration or something. Here is ...
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1answer
120 views

If the Earth was flat, what unit of measurement would distances between geographic points be represented as?

A whole lot of abstraction- given two longitude/latitude points given from a GPS, I'm using the Pythagorean distance formula to find the distance between them. What unit of length would the distance ...
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1answer
44 views

largest area polygon

I have a layer of polygon shapes, I know this could be a quite easy question to answer but I am a beginner and probably I am not using the right concept or terminology when looking at the desktop help ...
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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 = ...
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2answers
612 views

Find longitude for point between two coordinates with pyproj?

I've written a function to get the longitude of a point of known latitude between two known points (might not be working correctly yet), but I feel like there must be a better way of using pyproj to ...
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2answers
81 views

get center coordinates of a buiding(way)

Using overpass-turbo I got data like this: { "type": "way", "id": 292833530, "nodes": [ 2963934681, 924717449, 2963934682, 2963934683, 2963934684, 2963934685, ...
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1answer
57 views

How to re-reproject coordinates that are coming from GeoServer

I have a GeoJSON as follows: ...
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2answers
66 views

Field calculator fails when computing First X coordinate in ArcGIS10

I have this line in python to compute First X coordinates into the Field Calculator from each polyline: !Shape!.firstPoint.X Then, when I inspected the attributes I see this rare thing: You may ...
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1answer
38 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 ...
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1answer
468 views

Link Google Earth with QGis

I was wondering if it was possible to link Google Earth files (KML, KMZ) to a QGIS project. The main idea would be that if you'd add a point with coordinates in Google Earth, this point would be added ...
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1answer
219 views

Scaling x,y coordinates in proj4

This question was asked before, but without answer. Let's say we have mercator map with given resolution (for simplicity in centimeters). Now let's get coordinates of (lat,lon) = (50, 15): $ proj ...
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1answer
98 views

Get rectangle's coords in php

I'm trying to create a script which i give the center of a rectangle (in coords) and the preferred width and height (in metres) and return me the coords of four angles.Any idea about the ...
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1answer
23 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?
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1answer
63 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. ...
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1answer
125 views

How to set feature coordinates to values in attribute table?

I have some shapefiles that were produced programatically, and everything came out okay EXCEPT that the geometry information was not written correctly. The coordinates for each feature are null. ...
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2answers
292 views

Arcpy: calculating a field based on feature class geometry, eg 'if FC ==“POINT” calculate xy coord

I have a script that populates new fields based on user input. I would like it to also add the XY coordinates in DD if the Feature Class is a point feature, else, it moves on to the next command. I ...
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2answers
154 views

Looking for lat/lon for county seats

I'm currently designing a map for methamphetamine labs in my state. Ideally what I need is the center lat/lon coordinates for each county in my state or the lat/lon coordinates for each county seat. ...
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1answer
124 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 ...
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1answer
239 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.
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3answers
698 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 ...
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1answer
214 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: ...
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1answer
302 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 ...
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2answers
190 views

How to add Excel-sheets with meter coordinates to QGIS?

I have an Excel-sheet where the coordinates are in meters. What is the most efficient way of inputting this file to QGIS? There are thousands of files to put so please recommend some straight-forward ...
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3answers
1k views

Seeing lat, lot coordinates in raster and getting pixel value

I am new to QGIS and I have a simple question. How can I get the pixel value at a given latitude and longitude coordinate in a satellite raster image? Related to this, I cannot see the latitude and ...
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1answer
149 views

Plotting a point within a bounding box as a percentage of X/Y

I have two pairs of lat/long coordinates that represent the top left and bottom right corners of a bounding box. I have a third pair of lat/long coordinates representing a point within this bounding ...
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2answers
772 views

A shapefile / boundary coordinates for Bangladesh divisions

Are there any shapefiles on the boundary coordinates for each of the Bangladesh administration divisions? Essentially what I want to achieve is to have the minimum and maximum of the longitudes & ...
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1answer
159 views

Not able to convert GPS coordinates received from a software into Latitude and Longitude

I am working on a software which returns GPS coordinates in this format: Lat : '48684499' Lon : '5203474' I can not understand what type of coordinates are these and not able to convert them into ...
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1answer
445 views

How to convert drawn vector feature from EPSG:900913 to EPSG:4326

My script allows you to drawn shapes on an openlayers map, and then to get the WKT information from that shape, except the returned coordinates are in 900913 and i need them to be in lat/lon. thanks
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1answer
1k views

How to adjust the difference between the coordinate from OpenStreetMap and Google Maps

I have downloaded the OSM from OpenStreeMap that came with all nodes from the map and their respective coordinates. Now I have to plot a node (latitude and longitude) on Google Maps, but all ...
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2answers
968 views

How to find the proper coordinate reference system with two sets of data using different measurements or too convert one system into another

I have two different entries of data in two different spread sheets. One of the spread sheets uses a coordinate reference system that I have no idea what the units of measurement are. the properties ...
0
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2answers
413 views

Is there a way to get Openlayers' KML reader to deal with tessellation?

I'm trying to use OpenLayers' KML reader to display a KML file on a map, but the KML itself has LinearRings tha have a tessellate value of 1. I realize that this is used by google earth to snap the ...
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1answer
21 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 ...
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1answer
47 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 ...
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1answer
88 views

What simple and light Java library to use for WGS84 to UTM conversion?

Geotools and Geotoolkit are huge and complicated. CTS (1.3.3 from Maven) failed on me by not even being able to run its own test example (slightly modified ...
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1answer
53 views

How to get a PNG image of a polygon with the corner coordinates?

How to get a PNG image of a polygon with the corner coordinates in a separate file? I have access to ArcGIS 10.1 and QGIS 2.8.1. I tried this: http://gis.stackexchange.com/a/30503/50606 , but I get ...
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1answer
58 views

How do I calculate the latitude of an end point given a start point, bearing, and longitude of the end point?

I have a line that crosses the 180. Given the bearing from Point A to Point B, how can I determine the latitude of the point on the line, given the longitude of the end point to be -179.9999? For ...