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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65 views

Aggregate table with dates and average geographic coordinates

When SOG is 0 Stops gets 1. When the next SOG is 0 then Stops gets 2 and like this consecutively. Now I want to group all the rows where SOG != 0. The trick is that I should have the following ...
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1answer
132 views

Find lat/lng weighted midpoint from a list of points

Hello I would like some help on a specific task, I am a truck driver and I have an historical list of cities, lat/lng, count where count is the number of times that I've made a delivery in that ...
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2answers
218 views

Densify a JTS LINESTRING (add points)

I have a LineString I would like to "soften" in a way that if two coordinates (vertices) in the LineString are very far apart, I want to automatically add some coordinates in between. The line ...
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1answer
401 views

Problem with Converting XY Coordinates to LatLon

Here is the function that I use to convert from pixel x,y to lat,lon coordinate: public static Coordinate imageToWorld(Dataset gds, int x, int y) { double[] adfGeoTransform = new ...
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1answer
263 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 ...
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885 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 ...
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1answer
302 views

autocad-map of real estates with own coordinate system and information to be converted to use it in QGIS

I have a question regarding CAD and QGIS, but unfortunately I don't have a clue of CAD. Here it goes: Real estates data has been mapped. There are several reference points surrounding the area. So ...
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1answer
697 views

converting coordinates from unusual DMS format to decimal

So I've been shared a dataset with what to me is an unusual format for degree min second data. In their own words: The coordinates provided are longitude and latitude in degrees minutes and ...
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2answers
625 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 ...
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1answer
239 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, ...
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1answer
260 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 ...
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1answer
44 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 ...
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1answer
3k 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, ...
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2answers
89 views

Create Geographic Reference for X,Y Coordinates [closed]

I have a set of x,y data that do not have any sort of geographic reference. I have lat/longs (WGS 84) for a small set of those points. How can I calculate lat/long for the remaining points so I can ...
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2answers
430 views

Saving a gml layer does not change coordinates

I am trying to export a gml layer to geojson with lat/lng as the preferred coordinate system. So what I did was a 'save as' on the layer with selected CRS: 'IGNF: WGS84G'. Now I was hoping it ...
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1answer
198 views

How to calculate weighted mean coordinates with negative weights in QGIS?

Hi, I'm pretty new to prof. GIS, but have OSM experience. So if I just miss something obvious, please don't punish me :) I have a .CSV file with measurements of wifis along a track. I like to guess ...
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1answer
347 views

Google Earth tour LookAt not looking at same place as Placemark with same coordinates [closed]

I have tried to create a tour from a csv file. I want the tour to look at each Placemark in turn but the view is of a different set of locations when run in Google Earth. The Placemarks are plotting ...
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2answers
558 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, ...
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2answers
115 views

Coordinates system in degrees in plugins for QGIS

After adding a vector layer of coordinates of settlements of a part of the world INTO QGIS 1.8, I wish to add a topographic or other nice looking, colored map. Trying plugins like maps from Google ...
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3answers
3k views

Generate random location within specified distance of a given point

In a simulation (not using any GIS), I need to generate a random location that is within a specified distance of a given location. I found a very helpful post here on this exact topic: How to ...
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1answer
101 views

Conversion of coordinates of “Bochum coordinate system”

I need to convert historic coordinate data into more recent Gauß-Krueger data. Specifically, I need to convert "Bochum coordinates" used till 1960 in the local coal mines into DHDN/Gauß-Krüger zone 2 ...
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1answer
930 views

Adding Basemap and changing projection - still not aligned

I am using the basemap in ArcMap10 to create a shapefile of hand digitised polygons based on building outlines. However, when I change the basemap projection to Brit Nat Grid, it does not line up ...
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1answer
203 views

How do I obtain layout coordinates of features using arcpy?

I just read the topic about Convert point XY to page units XY using arcpy? but I didn't find a solution to my problem. I have a point layer file, I know coordinates in map view, I'd like to know ...
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3answers
346 views

Copy>Paste from meter to feet coord-sys, and coordinates don't change in ArcMap 10

My dataframe coordinate system is in UTM with linear unit Meter. If I have a Polygon shapefile in a UTM coordinate system with a linear unit of Foot_US and I am sent a shapefile in the same UTM ...
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1answer
719 views

convert GPS to x,y using reference node

i am using sensor nodes and their antenna to calculate GPS coordinates as notation of (degrees/minutes/seconds), i have some question of how to do these things: how can i convert latitude and ...
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2answers
768 views

Java GIS framework with custom shaped markers

I am completely new to GIS theme and I found this board so I hope I can get good advices from experienced users. I need to find an open-source Java framework/library/api that would generate an map ...
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0answers
11 views

Grid doesn't show up in printer composer

I am trying to get a coordinate grid on my map with the printer composer. I have tried every example and followed it exactly but for some reason the grid doesn't show up at all. I am working with Qgis ...
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19 views

Create pointe layer with table [duplicate]

I have a table with 13,000 points of geographic coordinates ( degrees, minutes , seconds) How I can create a layer of points ? QGIS or Arcgis . it is possible to create a layer of points with ...
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17 views

Create points with planar location data

Slightly confused. I need to add 3 point features to an already created map project (state plane projection). The description given to me about the location of the points is the planar location, so no ...
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0answers
35 views

Converting Lat/Long coordinates to ESRI format

Currently I have a CSV file which has Lat/Long coordinates which I got from the batch geocoding site, http://www.findlatitudeandlongitude.com/batch-geocode/#.VkWv97fNy70. I believe these are ...
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0answers
28 views

proj4js with geocentric CRS

I am developing a little web app to transform coordinates between CRSs. To do that I am using proj4js, but I notice that proj4js can't work with geocentric CRSs. Is there another tool similar to ...
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50 views

Georeference dwg file in arcmap

I have a dwg file and I want to georeference it with ArcMap. I have 4 coordinates given (in Degrees and Lambert), so I should be able to reference it. I used the georeferencing tool in ArcMap, but I ...
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37 views

Add a Delimited Text Layer in QGIS [duplicate]

Does anyone know how to put manually decimal coordinates in QGIS 2.12.3 Lyon? I have the georeferenced topographic map. I've tried to add feature point and then change the coordinates of the point but ...
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0answers
36 views

How to perform statistical test for two sets of points?

(I have asked this question originally on Cross Validated; however, no good answer and someone suggested me to ask the question here). We know that we can perform statistical test (e.g., t-test) for ...
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0answers
55 views

How to get the coordinates of the x-axis from a profile graph in Arcmap?

I have done already a profile graph in ArcMap drawing a diagonal line over a DEM image. Now I would like to add some point locations as it is showed in the attached figure. I set these blue points in ...
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1answer
46 views

updating Z coordinates of points in polylines

I have a polyline feature dataset with Z coordinates. I'd like to change the Z values (e.g.) by adding 10 meters. I am trying the following code, but no changes happen. It seems the code is able to ...
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0answers
9 views

Georeferencing image from google maps with gdal_translate? [duplicate]

I am trying to georeference an image using gdal_translate in a command prompt. Currently I have the following gdal_translate.exe -of GTiff -a_nodata 0 --config GDAL_DATA "Config location" -a_ullr ...
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0answers
94 views

GeoServer TMS with leaflet coordinates are different

I use the example tiger-ny layer from geoserver with leaflet like this: var map = L.map('map').setView([62.92578, 32.08523], 13); ...
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44 views

create polygons using 2 coordinates

I have a script that creates a text file containing the upper left and lower right coordinates of my geotiff files in the following format. TileName UpperLeftX UpperLeftY LowerLeftx LowerLeftY I ...
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1answer
102 views

Using pysal to map location of coordinates?

I am trying to map which county a set of coordinates I have are in. I want the code to go through each coordinate, check which county it is in, and then print the corresponding county. However, ...
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2answers
67 views

QGIS, indoor map with relative coordinates

i am trying to create an indoor map with relative coordinates where the bottom left hand corner of the map is (0, 0), and the CRS is UTM, so the distance between coordinates is in meters. previously ...
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2answers
60 views

What data projection should I use for area analyses in different countries at a global scale

I'm creating A4 maps to show where forest cover and mining fields overlap across the globe. Each A4 map focuses on a specific country (e.g. India, USA, China, Australia...). For each country, I need ...
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1answer
69 views

OpenLayers 2, GeoJSON cant get coordinates to work

I'm trying to display some Polygons on a map, and I'm new to OpenLayers, maps and GeoJSON. First what work: vector1 = new OpenLayers.Layer.Vector("GeoJSON1", { projection : "EPSG:4326", ...
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0answers
12 views

Increment GPS coordinates by a certain distance given in meters [duplicate]

Say I have this point: 45.1200,10.5000 From there I want to create another point that is 20 meters north and 10 meter east from the previous point. Is there any equation I can use for doing this?
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33 views

Converting 3d images in meters to feet when exported to dxf

In QGIS 2.10, I am using the raster calculator to convert a metric elevated raster to feet and then create 2 foot contours (no problem). But when I dxf it out and put it in CAD, I can get the contours ...
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144 views

Getting random coordinates based on country

Are there any webserveices/APIs that can take a country name and return a random coordinates (not including the sea/ocean sections) inside that country?
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46 views

GPS point elevation vs Contours layer elevation

I have some survey grade GPS points whose elevation is approx 55 feet lower than my contours layer elevations. I am using 1 ft contours and comparing point elevations with contours in the same ...
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1answer
99 views

Adjusting UTM and geographic coordinate data

I have a dataset with several points in space within a given area. UTM coordinates (easting, northing in m) or geographic coordinates were recorded for a single point in the vicinity of these points. ...
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57 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 ...
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16 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 ...