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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58 views

set extent for jpeg programmatically

I feel like this should be easy, but how can I set coordinates for a jpeg image using Python? I have a python add-in that draws a polygon and then uses its geometry to post a query request to a REST ...
6
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2answers
859 views

How to get latitude, longitude and altitude database from a GeoTIFF file?

I am developing an AR iOS application. When the iPhone gets the current location, it has to calculate locally the visible point. I want to read the tiff files in my application, and then get the ...
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1answer
84 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 ...
2
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1answer
64 views

How to use qgis coordinate transformation in user code

I am now working with coordinate transformations between different CRSs, e.g. latlong to UTM. After comparisons, I found out that the coordinate capture plugin in QGIS is quite accurate for the ...
2
votes
1answer
175 views

Comparing two maps with two different libraries

I'm currently making a demonstration to compare the two OpenLayers libraries (2 and 3). For doing this, I have made two div elements and put the different maps on each other. The goal is to make a map ...
3
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3answers
204 views

Find CRS (coordinate reference system) based on known location and coordinates?

Is there any tool or any tutorial which would help me to figure out CRS (coordinate reference system) from related information? In my particular case I know only the system is in meters, has origin ...
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39 views

Cumberland C sharp .net mapping framework. Render a map on a picturebox and retrieve coordinates

I'm using this open source project to manage my cadastral maps and show them on a win32 C sharp application. https://code.google.com/p/cumberland/ I managed to draw the map on a picturebox, panning ...
2
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1answer
53 views

warping and outputting coordinates of GeoTiff data: advice and error checking

So I have a massive TIF file (projected in Lambert azimuthal equal-area), and I'm trying to get lat/lon coordinates for each point of the grid. My first step is to warp the projection to the WGS84 ...
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1answer
400 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 ...
3
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2answers
2k views

Update point coordinates in QGIS after manually moving locations in edit mode

I have imported point coordinates from a database, but I need to manually adjust a lot of the locations. Is there a way for QGIS to automatically update the point locations in the attribute table ...
6
votes
3answers
2k views

Adding “noise” to overlapping X,Y coordinates so no longer in EXACT same place?

I have a series of points representing animal observations. Many of them overlap, having the exact same coordinates, and this is causing me trouble when I want to run some analytical tools which ...
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1answer
263 views

How to calculate the shortest geographical distance between a line and a point? [duplicate]

I'm trying to calculate the shortest distance between a line (described as a pair of [lat, long]s) and a point (lat, long) accurately. I've read many Wikipedia pages, but I'm new to the topic. I've ...
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3answers
8k views

Is there a way to populate a spreadsheet of city names with their latitudes and longitudes from Google Maps or some other service?

I have a long list of cities in the United States, and would like to get the coordinates for each city without looking up each one individually. Is there a way to do this?
2
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1answer
105 views

Get feature data from lat long input QGIS

In QGIS, I have a polygon dataset with feature data. I would like to extract data from this dataset using a latitude and longitude. To be more clear, I have a list of 1000 coordinates. I would like ...
1
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1answer
334 views

Converting mercator meters without UTM zone?

I've been attempting to extract track information from Humminbird (Side Imaging Sonar) binary files and have hit a stumbling block with the coordinates it provides. The values are apparently in ...
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0answers
48 views

Does Unicode Common Locale Data Repository (CLDR) library have rules for longitude/latitude coordinates?

Does the Unicode Common Locale Data Repository (CLDR) library contain rules for formating longitude/latitude coordinates? I am looking for information how coordinates should be formatted in each ...
0
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0answers
27 views

Coordinates of ENVI exported vectors completely reversed when loaded in ArcGIS Desktop?

I have a problem with the coordinates of vector evf in ENVI. I'm working with a well referenced raster doing a supervised classification. The exported vector is completely reversed when loaded in ...
5
votes
2answers
5k views

List of central coordinates for all countries?

I need a list of the central points for all countries: China: lat/long (coordinates of the most central point in China) France: lat/long (coordinates of the most central point in France) etc...
3
votes
1answer
8k views

Making POINT from longitude/latitude coordinates in existing table using PostGIS?

I would like to make a POINT using the longitude and latitude columns of an existing table. Here's a link to the documentation of ST_MakePoint. Here's my table: CREATE TABLE sysinst.bio ( oid ...
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2answers
117 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 ...
2
votes
1answer
89 views

Uses for “Calculate Geometry” option

Is there another use for "Calculate Geometry" aside from calculating area, length and points? I already read the help section ArcGIS Help (10.2, 10.2.1, and 10.2.2) and it's very informative. ...
2
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0answers
159 views

Calculating Distances between coordinates

I have perused through the other questions that are very similar to mine but am still having some trouble. I have 75 coordinates in WGS84 that I brought in from an Excel table. They are now on my ...
2
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0answers
528 views

Mean coordinates in QGIS

I am using QGIS v 1.7.4 for MAC and I am trying to calculate mean coordinates for a set of points using ftools. To calculate my result I am going to Vector -> Analysis tools -> mean ...
4
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2answers
2k views

Point interpolation in route

I have a set of GPS coords with X,Y and Course. I need to interpolate additional points based on the course of each point. It would be a simple line intersection based on lines drawn using the 2 ...
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0answers
97 views

Rounding off coordinates in an SpatialPolygonDataFrame in R

EDIT AFTER COMMENTS After a comment of Whuber (Thank you!) I realized it will probably be most easy to incorporate a round(...) statement within my code to be able to work with less decimals. ...
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1answer
255 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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2answers
527 views

How do I convert Geo-Coordinates to Pixel-Coordinates on a Map?

I have an image file that is a Robinson Projection Map of the world. I have a list of geo-coordinates. I would like to find the pixel-coordinates on the map that correspond to my the geo-coordinates I ...
2
votes
2answers
8k views

ArcGIS: Create polygon using file containing point coordinates

I have a text file containing the projected coordinates of the points that define a single polygon. The X, Y coordinates are separated by Tab Is there a tool in ArcGIS similar to "Add X,Y Data" in ...
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2answers
74 views

Drawing the boundaries on coordinate file and classifying the points

I have imported the data on coordinates in Excel which are classified into 3 types: Class 1, Class 2 and Class 3. When I Add delimited text layer, I get the following output: I have two basic ...
3
votes
4answers
450 views

what is the suitable projection coordinate system for Iran

I am doing analysis for province wise Iran. I am using WGS1984 as my geographical coordinate system, and I do not know which is suitable Projection coordinate system for entire Iran. I feel the UTM ...
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0answers
56 views

My map is little bit off

I am pretty new in GIS things and i have been learning how to use QGIS. Most of the maps are fine, but yesterday I went to GIS center at my University and I got the maps of my country that I will be ...
2
votes
1answer
40 views

Atributing fields in arcmap and excel

How do I populate a field in ArcMap (and Excel) with only a specific part of another field's attributes? For example: I want to populate the LATDEG field with only the degree part of a latitudinal ...
2
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0answers
79 views

Getting XY screen coords from ArcScene 3D point using ArcObjects?

I already know how to convert screen point (X,Y in pixels) to 3D point: ISceneGraph pSceneGraph = m_pSceneHookHelper.SceneGraph; IPoint pPoint; pSceneGraph.Locate(pSceneGraph.ActiveViewer, X, Y, ...
2
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3answers
406 views

How to convert PCS based point X/Y into GCS Lat/Lon using ArcObjects

There are so many permutations of questions I've tried to find the answer to my question from various sources, but I have yet to actually find an answer the way that makes sense to me (and works). ...
5
votes
1answer
154 views

How often does Google change the geo-coordinates for a given address?

I geocoded the address "50 Hurt Plaza Southeast, Atlanta, GA 30303" twice. Once on July 28th, 2014 when I got the coordinates: (33.754208, -84.387272) And again today, August 18th, 2014, and got ...
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1answer
102 views

Finding coordinates of the image corner

I have a .bmp image with a map. For creating image i used a Ingeo 4.4 and function MakeImage() What i know: Height an Width of bmp image dpi Map Scale Image Center's coordinates in meters. What i ...
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1answer
67 views

Buffering algorithm [closed]

Does anyone know the algorithm of buffering? I had difficulty in drawing buffers. So I tried many values to acquire 1km buffer. I found value 0.008966 produces 1km buffer. Then I calculated inverse ...
2
votes
1answer
126 views

WorldWind wms services show reversed coordinate in ArcGIS Desktop

I'm adding WorldWind wms services (http://data.worldwind.arc.nasa.gov/wms?) to ArcMap (ArcGIS 10.2.2) but maps are misplaced, looks like they have reversed coordinates (as explained here: ...
5
votes
1answer
87 views

What kind of coordinates are this ones?

I have to map a point using this coordinates: 38 R MF 18852 15799 I can't understand the coordinate system. For sure '38' is the UTM zone number and 'R' is the designation (indicating southern ...
2
votes
1answer
1k views

Getting polygon shapefile node coordinates and point order

I am trying to get the coordinates of each node of a polygon in QGIS. What I basically did is use the following tools: Vector -> Geometry tools -> Extract nodes Vector -> Geometry tools -> Export ...
1
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1answer
90 views

What UTM like coordinate system is this?

I have this set of coordinates: 4622580.00000, 503749.00000 They should roughly correlate with 51°01'39.4"N 13°44'44.2"E in Dresden, Germany. At first I thought they might be UTM, but that puts me ...
5
votes
3answers
3k views

How to export polygon coordinates to CSV (not WKT)?

I am new to QGIS, and I am now trying to export polygon coordinates from a shape file to a csv file, but so far all my attempts have failed. I have found numerous questions and answers about this, but ...
0
votes
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
3k views

How to calculate Distance, Azimuth and Dip from two XYZ coordinates

I have two XYZ coordinates and I would like to calculate the Distance, Azimuth and Dip between them. I have come across a similar question on this site that calculates it the other way around (with ...
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2answers
37 views

Identifying my coordinates from external datasource

I'm working with data received from an agency outside of my office and two columns in the dataset are labeled 'CompX' and 'CompY'. Here is a sample set pulled from the spreadsheet: ...
2
votes
2answers
502 views

How likely is it that Smartphone Camera GPS coordinates are wrong?

According to the coordinates printed directly on this photo of my late son Kelvin here: https://www.dropbox.com/sc/w6tvwuvbosuh9rk/AADzT-3vDXcFQ9LnKK1BYMZUa ...and the Exif data from the .jpg: ...
0
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1answer
103 views

How to create GoogleMaps/OSM hyperlink for given bbox coordinates

I have extracted the bbox coordinates from a shapefile and want to create a hyperlink for google maps respectively OSM. When you click on the hyperlink the map should be zoomed to the bbox extend and ...
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1answer
768 views

Calculating distance between two sets of Decimal Degree coordinates?

I have coordinates in decimal degrees e.g: point A:Lat,Lng(5.317101667,-2.023303333) and point B:lat,lng(5.317093333,-2.023318333). The altitude in Meters at Point A is 11m and the altitude and Point ...
0
votes
1answer
263 views

Coordinate extraction in a different projection in MapInfo

I have a .TAB file of polyline objects in British Grid Coordinate. I need to extract the end points/nodes of each polyline and find their latitude/longitude (WGS84). Would really appreciate some ...
2
votes
0answers
71 views

Choosing the map scale (1:nnn) for the given raster dimension

Starting points: let define the raster image size, say: 1800x900 pixels I want draw my own raster image map - by drawing polygons e.g. like "draw line from pixel with coordinates x100y100 to pixel ...