Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.

learn more… | top users | synonyms (1)

0
votes
1answer
53 views

georeferencing an image from GoogleEarth

What I actually want to do is very simple, however, there seems to be a bug: I have an image from GE which I want to georeference and set as a background layer. I thus set some placemarks on GE, ...
1
vote
1answer
64 views

Can I define a transformation between 2D and 3D in Geotools?

I'm using Geotools, and I need to convert coordinates between 2D and 3D coordinate reference systems. I recognize that there's no universally-correct way to do this: 2D -> 3D means "making up" a Z ...
0
votes
2answers
100 views

Defining a scale number from the Helmert transformation

I know this is more bit of a cartographic issue, but maybe somebody would be able to help. I have an old map georeferenced to the openstreetmap with 50 identical points. I want to get the scale of the ...
0
votes
1answer
66 views

How to georeference a map - which is in projected coordinate system - using geographic lat long? [duplicate]

We have some hard copy maps which were projected in Gauss Kruger coordinate system (in the legend it has been mentioned). But, the coordinates were given in Geographic lat long (Beijing 1954). In ...
0
votes
2answers
87 views

Geo- referencing Projected coordinated raster with GCS - ArcGIS

I have raster displaying Lat/ Long grid, but map information shows that, it s been mapped in Gauss Krugger projetion/ Beijing 1954. So, technically we need to geo reference the map in Gauss Krugger/ ...
0
votes
1answer
66 views

Georeferencing PNG against Google maps with openlayers plugin

I am trying to georeference blueprints to the footprint of a building. I'm using the Google Satellite image from the plugin to do this. The blueprints are rotated about 30 degrees. When I run the ...
0
votes
1answer
63 views

How would I flatten a projected vector dataset to georeference a historic map to it?

So I have vector data for quad lines, township/range lines and section lines for this area. The data is already projected into NAD83 UTM zone 10N and the lines are no longer straight. They warp ...
2
votes
1answer
126 views

georeference and orthorectification of aerial photos

I am trying to process photos taken with a tetracam ADC micro camera placed on a UAV. I have GPS coordinates and mavlink logs providing roll, pitch and yaw of the UAV. I am having a real hard time ...
0
votes
1answer
61 views

Georeference in ArcGIS to a known scale?

If I'm georefencing an engineer's drawing and the scale is 1:250 is there anyway I can input this into ArcGIS for accuracy once I've selected a few points to georeference?
1
vote
0answers
22 views

Which georeferencing method for Himalayan Awifs-Awifs registration

I would like to know which georeferencing method would provide the best result for Himalayan region in-case of Awifs(Raw) to Awifs(master) georeferencing.. I have already tried polynomial ...
0
votes
1answer
49 views

Automate Add Layer in ESRI ArcMap 10.1 [duplicate]

Using ArcGIS Desktop v10.1 with an Advanced level license we have georeferenced our engineering drawings in PNG format. Next we have created a polygon layer for every single drawing to see the Area of ...
0
votes
1answer
163 views

JPEG base map doesn't match shapefile locations

Relative Newbie Question: I have Civil War earthworks tied to the State Plane Coordinate system with a jpeg of the terrain as a 100k scale USGS Quad of the area that is not georeferenced. When I work ...
1
vote
1answer
114 views

Add georeferenced png layer to map automatically

Using ArcGIS Desktop v10.2 with an Advanced level license we have georeferenced our engineering drawings in PNG format. Next we have created a polygon layer for every single drawing to see the Area of ...
7
votes
3answers
300 views

Merge images first, or georeference first?

I'm wanting to georeference and vectorise some features from scans of the OS 1896 Town Plans that I have purchased from the NLS (http://maps.nls.uk/os/london-1890s/info.html). The scans provided are ...
1
vote
1answer
220 views

What is the coordinate system of this maritime natural gas field map?

The Israeli Ministry of Natural Infrastructure, Energy and Water Resources published a maritime map of the borders of a new natural gas field. The map is a part of a full license (PDF), a legal ...
2
votes
1answer
42 views

How to fix “The selected file already seems to have a world file!” when image hasn't been georeferenced before?

I am georeferencing historical aerials from 1988 in QGIS 2.2.0. Sometimes it works perfectly and other times after I have places my points and start the georeferencer a window pops up saying: "The ...
0
votes
1answer
154 views

How to remove black box around georeferenced grayscale image in QGIS?

i'am trying to georeference a grayscale image (*.tif) in QGIS 2.2.0 Valmeria. It is working but QGIS draws a black box around the georeferenced raster image. If i use the option set 0 transparent, not ...
3
votes
2answers
54 views

What is the closest CRS to “Meridiano de Greenwich”

I have a 1906 scanned map that I am trying to georeference in QGIS for Mac. The map has French and English lat-long, indicating them as either "Meridiano de Greenwich" or "Meridiano de Paris." I would ...
2
votes
1answer
131 views

How to georeference an image in ArcMap, using coordinates from a KML file

My starting point is KML file containing a PNG image, which displays correctly in Google Earth: From Google Earth I choose > Save Place As > KML, which gives me the unprojected PNG file, plus ...
0
votes
2answers
97 views

Creating outline shp - georeferencing existing map/pictures

So I need to create shapefiles (that need to be adapted and transfered for other programs) with the district outline of a couple of Caribbean countries. Is georeferencing (using the Georeferencing ...
0
votes
1answer
73 views

Georeferencing an aerial image based on satellite imagery

As part of a bigger project I need to georeference an aerial image based on a landsat image downloaded form usgs. I use qgis. can I somehow place the layers on top of each other and mark certain ...
0
votes
1answer
230 views

What method should I use to accurately georeference a geographic map?

I'm writing an application that allows the user to sample points and perform georeferencing In order to test it I have a large scanned map (16k x 13k) pixels covering the area 31 north to 34 north ...
1
vote
1answer
33 views

Changing georef backgound colour

Working with a greycale scanned image: when I georef that image it rotates (expected) the blank corners are then filled with black. When the new image overlays I need to make those corners ...
0
votes
2answers
143 views

Help, I have 10,000+ .shp files covering 3 UTM zones with unknown projections

I was handed a ton of property files with no projections attached but was told they are all in UTM zone 21S. Well once I merged them all together and projected them I realized that the data covers 3 ...
2
votes
1answer
73 views

problem georeferencing a TIFF QGIS

I'm trying to georeference a TIFF in QGIS2.0, 32Bit. The problem appears when QGis adds the map in my project, the map transforms into a black square and it goes to the wrong place. In the next image ...
3
votes
1answer
584 views

Georeferencing an image with GDAL, based on QGIS Georeferencer Plugin

I would like to georeference an image with GDAL. The image already has a spatial reference set (EPSG:31276). For the georeferencing, I have a list of 4 ground control points (also in EPSG:31276). ...
0
votes
1answer
203 views

How can I correct a .pgw file for a PNG image?

I have a PNG file and I need its .pgw file to be set with NAD 83 as the projection. I have created a .pgw file: 799 0 0 -799 -122.562 37.1946 However when I open the PNG in QGIS or ArcMap 10.2 it ...
0
votes
1answer
39 views

How can I locate additional GCPs?

I'm a new user of QGIS. I'm georeferencing a scanned image of topographic map. At least 16 GCPs were required for us to locate. However, only 12 can be located and can be identified and be defined ...
0
votes
0answers
148 views

CartoDB Geocoding Not Working?

I'm using CartoDB to map events on my college campus. First off, I have two tables of data. The first table contains information about the buildings the events can possibly be located within. The ...
0
votes
1answer
36 views

Determing which Which georeference system was used on an Ecuadorian Topo Baselayer

I'm creating a map in Western Ecuador, and am attempting to use a military topo baselayer for it. The map comes with UTM grid lines on it so georeferencing it was easy but I'm unsure of what ...
1
vote
1answer
258 views

How to plot street addresses and streets using Python/GIS?

I asked this on stackoverflow but did not get a really clear answer. I am not really familiar with GIS systems in python. I am looking for a library to do the following: Lets say I have a pandas data ...
1
vote
2answers
448 views

How do I open images georeferenced in ArcMap in QGIS? (.aux.xml)

We have several ArcMap georeferenced images (raster datasets) that we are attempting to open in QGIS without any luck. These are not inside of a geodatabase and are not Arcinfo Binary Grid format or ...
3
votes
1answer
94 views

Re-registering a GEOTIFF in qgis

I'm working on some images taken from a UAV over the course of a year. They are OSGB 1936 projection as is the whole project. Annoyingly they don't quite line up so I am trying to a few of the images ...
1
vote
1answer
85 views

Why do MGI and WGS 84 data not line up in ArcGIS for Desktop?

When i reproject raster from MGI 6 zone to the WGS84 it makes a mistake (it is moved for 380 m )See example below: I know that the problem is in MGI 6 projection (it is not accurate),but I do not ...
1
vote
1answer
75 views

Why do features in QGIS drawn on same datum as Google imagery from OpenLayers move? [duplicate]

I have just started using QGIS. I've loaded the "openlayers" plugin and added a google hybrid layer, which is based off the WGS84 datum to my understanding. Now I create a shapefile and add a new line ...
1
vote
0answers
36 views

Shapefile of Israeli sub-districts

is anyone aware of freely available shapefile of Israeli sub-districts? The file I found only contained data at the district level.
3
votes
2answers
124 views

Geographically georeference image with limited information

It is possible to semi-accurately georeference an image given only the following information? I'd like to do this programmatically. Center point of terrain, Lat/Lng (WGS84) Pitch of camera FOV ...
0
votes
1answer
640 views

Convert long/lat to indian grid system

how to convert lat/long coordinates to Indian Grid system? I've googled for a couple of days but didnt find the exact algorithm for this. and i got a link Indian Grid System. but i didnt get a picture ...
2
votes
5answers
135 views

Georeferencing a .jpg image

I am having a .Jpg image of a district. I need to georefernce it. The problem is that I can able to find only one control point of it . All other line features (are Roads) which I cant able to match ...
1
vote
2answers
245 views

how to georeference my png using gdal

Hello I have created my own fantasy map, I have the map in a full size png and the map broken down into tiles ( with no geo data ) I installed MS4W and tried to use it to get the georeference data ...
0
votes
0answers
99 views

.svg georeference?

How would I go about taking a layer from AI or Inkscape and importing it into Arc? I've got a vector drawing I want to use and I know I need to georeference it but I'm lost as to how. I also can't ...
1
vote
1answer
75 views

How to georeference downloaded map using ArcGIS for Desktop? [closed]

I want to georeference a downloaded map. In the downloaded map there is no graticule but I know the projection which was used to make this map. I also know the the location (x, y coordinates) of ...
1
vote
1answer
123 views

Is there a bug in Georeferencing in QGIS 2.0?

I recently updated to QGIS 2.0. But now, when I need to georeference some pictures, I have serious problems. When loading the files to be georeferenced, I can see only a part of it in the window, so ...
1
vote
1answer
71 views

Georeferencer plugin will not load in QGIS

I have downloaded and installed QGIS. I would like to georeference an image using the core georeference plugin. When loading it no toolbar appears and the 'update', 'reinstall' etc boxes in plugin ...
0
votes
1answer
152 views

gdalbuildvrt error, when using in Python

I am new to python/GDAL and am running into perhaps a trivial issue. This may stem from the fact that I don't really understand how to use GDAL properly in python, or something careless, but even ...
4
votes
1answer
401 views

Direct Georeferencing with X,Y,Z and Omega, Phi, Kappa

I have images taken from plane, it's longitude, latitude, elevation, omega, phi, kappa. I suppose that earth is flat (I don't need any DEM on that stage) and I want to calculate how image is nailed to ...
1
vote
1answer
211 views

using GDAL/python to stack georeferenced images of different sizes

I am in the process of porting a code I wrote in IDL (interactive data language) to python but am running into a bit of a problem that I am hoping someone can help me with. The code goes like this: ...
0
votes
1answer
49 views

Can I export an imagery directly to a geo-referenced raster form File|Export Map in Arcmap?

While using File|Export to export an imagery to raster, is there a way to have it geo-referenced in a way that if I load the exported raster into the map, the image sits exactly in its place without ...
3
votes
2answers
230 views

Python Script: Automatically georeference photographs (To be used in ArcMap)

I have 563 photographs that have been taken as part of a site survey. The only location information that I have is a single GPS location (lat,long) at which the photograph was taken. I'm looking for a ...
2
votes
1answer
62 views

How to get a collection of georeferencing control points in an ArcMap document?

I have created control points (i.e. links) using ArcMap's Georeferencing toolbar. How can I programmatically retrieve a list of these points? I'm looking for something like an enum of the links you ...