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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1answer
127 views

Using twitter coordinates in OSGeo library

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 = ...
0
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3answers
177 views

find border coordinates of brazilian states

I am looking for coordinates (longitude and latitude) of each state of Brazil. Where can I find that? I have found a file for the US states here: http://econym.org.uk/gmap/states.xml, I am now ...
0
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0answers
81 views

Layer coordinates and geometry in ArcGIS API for JavaScript? [on hold]

I'm working on a system that uses the ArcGIS API for JavaScript with layers and map to display information on borders of specific regions. I don't want to display all information at once and prefer ...
1
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1answer
21 views

KD-Tree implementation with lat/lon coordinates

I have implemented a KD-Tree that stores coordinates (latitude, longitude). I have also implemented a Nearest Neighbor search algorithm using the Haversine distance. Will I get correct results (same ...
1
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0answers
17 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 ...
0
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0answers
36 views

Project (lat,lng) GPS point to a line segment (road segment)

Is there a way to project a point A to a B,C line segment and find a point D ? The points are latitude, longitude points, so I believe we should incorporate the haversine distance formula. Edit: I am ...
1
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1answer
251 views

SharpMap Coordinate transformation Problem

I want to transform my layers from SRID 31463 (Gauß Krüger) to Webmercator. Since SharpMap does only know webmercator and WGS84 i tried to create the Coordinate System 31463 by WKT and applied it on ...
12
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1answer
686 views

What format is a location represented like this?

While converting an old system, I came across a position column with values in a format like this: 38RQT6410550656 While I've never seen global positioning represented this way, putting this in ...
1
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1answer
112 views

Postgis How to populate column with geography data from geometric data?

I stored my point date in geometry format with SRID 4326 supposed EWKB (data looks like this "0101000020E610000071F1A611E9392640AECD10D8E68C4A40") = way geometry(Point,4326) I want to have the ...
1
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1answer
23 views

Postgres/postgis st_makepoint

I am looping through a csv, taking latlng values and trying to add there geometry to postgis enabled postgres table. xy values are int's conn = psycopg2.connect("connected") cur = conn.cursor() ...
1
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1answer
52 views

Adding XY coordinate to map in ArcGIS (not in dataset)?

Is there a quick and easy way to add an XY coordinate in ArcGIS outside of creating a table? A coworker just wants to see what that point is on a topo background. I just want to see where a ...
0
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1answer
49 views

Inverted lat lon on drawn polygons in Openlayers 3

I am working on a map in openlayers 3 with geoserver I display the layers as WFS and I added the draw and modify interactions, but when I save the drawn polygons the coordinates of the newly drawn ...
0
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1answer
218 views

How to measure distance between two coordinate pairs taken from NMEA file?

In order to measure momentary speed, first I need to measure the distance between two pairs of coordinates. That's where my lack of knowledge stops me. I have example data in NMEA format: ...
2
votes
2answers
49 views

Which points in projected raster corresponds to certain latitude,longitude location?

What I have is a SRTM 3 arc-second raster file in WGS84 geographic coordinate system (here is that file). I then project it to the Azimuthal Equidistant projection with GDAL: gdalwarp -s_srs ...
1
vote
1answer
34 views

Fill array with coordinates within geographical bounds in Leaflet

I want to create an array and fill it with geographical coordinates I get from a bounds variable. Basically, a for-loop shall create coordinate pairs within the specified bounds with a fixed distance ...
1
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1answer
192 views

Can layers with different extents in arcmap 10 be made to line up?

I am currently trying to get some insect sampling coordinates that are represented by points to project on top of a polygon that shows all the different plots of land in a ranch. The coordinates for ...
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0answers
20 views

Get geographical coordinates from these ones

Can't seem to able to identify what type of coordinates do these belong to: 9610346,87 E 5235025,08 N They seem like cartesian coordinates, but online converter converts them like this: ...
-1
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0answers
42 views

How to update polylines coordinates in postgis after editing the polylines in Leaflet

I have a leaflet map in wich I can draw polylines and edit them. Each time I’m creating a new polyline, I send my coordinates to postgis using a php script. When editing my polyline layer, I would ...
2
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1answer
26 views

Wrong calculation of line start and end XY coordinates of a merged line- how can I fix this?

I have a feature class containing several rivers, which are derived from merging individual river segments to make a continuous line. They have been merged using the editor tool. I have calculated ...
5
votes
1answer
975 views

Geotagged tweets and Twitter API

When I do a timeline query using the Twitter API, http://api.twitter.com/1/statuses/user_timeline.xml?screen_name=MyTwitterName the geographic component of the reply looks like this: ...
0
votes
0answers
28 views

Converting polylines coordinates stored in PostGIS in column type text, in another column type geometry(MultiLineString,2154)?

I want to draw a polyline on a leaflet map and then send it to PostGis with php. I’m drawing my polylines using the Leaflet draw plugin and send the coordinates in a column “coords” in PostGIS with ...
1
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2answers
36 views

XY Coordinates result in weird scale

Currently trying to display XY data with what I consider unusual coordinates. These coordinates come from a transit scheduling software called HASTUS. Though I'm able to plot the points in relation to ...
1
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1answer
33 views

How to create polygons associated to coordinates (QGIS)

I'm trying to create polygons associate to given .csv files. On the polygon I would have to be able to read the coordinates x, y (AND Z) because I need to interpolate points and work with them. I know ...
3
votes
1answer
69 views

Coordinate points not lining up with a preexisting map on QGIS

I asked this question once before, but I did not receive any feedback on solving on the issue and I am still confused as to what I am doing wrong. I found a public domain map of Florida counties on ...
3
votes
1answer
473 views

Determine when I have crossed state line?

We are currently using the Google Maps API to get route information and total mileage but we would like to determine when we are crossing into a new state. When we return the route information we can ...
8
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3answers
3k views

What are the coordinates of the mysterious hole in Siberia?

I am interested in taking a Google Earth aerial view of the mysterious hole recently discovered in Siberia and perhaps doing some hydrological analysis of the area in a GIS. However, there appears to ...
3
votes
1answer
93 views

Change the actual coordinates in a shapefile (QGIS)

I'm trying to map data for a county in Texas. The data were provided to me in a shapefile, and I've been working with it in QGIS 2.14. My problem is this: The coordinates in the shapefile I was given ...
2
votes
1answer
301 views

How to get coordinates by click on map and send coordinate to MySQL?

I'm building my own web map. Now I want to get the coordinates by click on the map and send the coordinates to MySQL. I tried OpenLayers to get the coordinates from Openstreetmap,but I didn't know ...
0
votes
2answers
568 views

How to plot lat/long stored as text in Oracle DB using report builder/SSRS r2

We use an Oracle 10g database. However we write reports using SSRS or report builder, using the Oracle connection type to the datbase. In oracle we have 2 text fields, one for lat and one for long. ...
0
votes
1answer
1k views

How to make coordinates match between Google Maps and matplotlib.basemap

I'm trying to plot some data with matplotlib and basemap, but I have trouble making the coordinates match between Google Maps and basemap. For example, I click at a distinctive feature on the map in ...
3
votes
2answers
151 views

Transform geometry to coordinates

I need transform with postgis a geometry of type ...
2
votes
1answer
38 views

How do Wikipedia maps add a coordinate point to a base map?

On wikipedia pages for localities, there is often a map on the right side of the page in the introduction, and the map is tagged with the point of the locality. For example, see below: ...
5
votes
3answers
112 views

Are perpendicular lines still perpendicular after converting from UTM zone 15 to 16 (or between two neighboring zones)?

I want to convert a square polygon that is close to the edge of UTM zones 15N and 16N. The polygon's coordinates are in UTM 16N, but it is spatially positioned in the UTM15 area. My question is that ...
2
votes
1answer
53 views

Coordinates calculation using QGIS

I am quite new to GIS software. I use QGIS. I have a question that might be trivial. I would like to derive the coordinates (Y and X) for an area. Just to make an example: I have two regions A and B. ...
0
votes
0answers
13 views

Selecting the feature under the pixel

I am using a Vector/kml layer with an event to show a popup when the user clicks on an item. Relying on the evt.pixel doesn't look fine, since rarely does the user click exactly on the middle of the ...
4
votes
2answers
537 views

Plotting X, Y coordinates generated from MySQL database in QGIS

Currently running QGIS 1.8.0 on Mac OS X 10.8.4. I can plot points on a map using the "Add delimited text layer" plugin to get x-y coordinates from a text file. However, I'd like to be able to ...
0
votes
0answers
24 views

How do you line up a pre-existing public domain map with csv coordinate points on QGIS?

I have been struggling with this simple problem all day. I found a Florida map with the counties on Google for GIS. I uploaded the map to QGIS with no problem. However, whenever I try to upload points ...
1
vote
1answer
35 views

retrieve rectangle from a latitude and longitude coordinates in FME

I wanted to retrieve a rectangle with FME from two points (point 1: latitude and longitude and point 2: latitude and longitude) that are stored in the postgres database in text fields: text field 1 = ...
0
votes
1answer
337 views

Check if a point cordinate is between linestring cordinates

I know that, linestring is a vector and if i want to check that, if point cordinates are between linestring begginning and ending cordinates then i need to use vector comparison (x2 > x && ...
1
vote
2answers
871 views

Getting all vertex lat, long coordinates every 1 meter between two known points using PHP?

I am currently using php to try and write code that will take a start point and end point latitude and longitude coordinate pair in decimal degrees and calculate the latitude and longitude of every ...
2
votes
3answers
61 views

Identifying coordinate system?

I'm wanting to create a data layer using some open crime data from Salt Lake City, but I can't figure out the coordinate system they are using. See the link below to view the data. (You'll have to ...
1
vote
1answer
30 views

How to determine the closest feature to my points?

I am doing a research on transportation for motorcycles. For each trips, I have the origin points and the final destination coordinate points. I also have another landuse layer with my points of ...
25
votes
7answers
43k views

How do I create point features with exact coordinates?

How do I create point features with exact (manually entered) coordinates in QGIS? I get precise GPS coordinates from a survey team which I need to add to a point layer. What I want: -Add point, type ...
0
votes
1answer
74 views

How can i convert the coordinates (latitude,longitude) to X,Y using postgis

I want know how i can convert the latitude and the longitude coordinates of a rectangle in the Cartesian coordinates, so I can store them in a geometry field using postgis.
3
votes
0answers
69 views

GPS points displaying in the wrong place [closed]

I'm trying to help a student by importing an excel table of Lats and Longs into Arcmap, but they are displaying in the wrong location - I am also a bit suspicious of the coordinates. I imported the ...
1
vote
4answers
3k views

clipping polygons (vector) map with a polygon (vector) layer

A frustrated newbie with QGIS Lisboa version in Windows 7. I want to clip a soil map (multiple polygon vectors) with a single polygon (rectangular polygon vector). The project projection is set at ...
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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 ...
0
votes
0answers
27 views

Forming a uniform grid of GPS coordinates from a starting GPS coordinate

I'm trying to find a method in which I can form a uniform 2D grid, relative to a starting GPS coordinate. See the diagram below The red point represents the starting GPS Coordinate, which can be ...
0
votes
1answer
2k 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 ...
0
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1answer
37 views

Find Lat and Long points on land only

I'm new to R and GIS so please forgive me if this is a simple request. I was looking for a way to find out if a Lat/Long point is on land or ocean. I found this previous post from a couple of years ...