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

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2answers
151 views

Problem with reprojecting raster from MGI 6 to WGS

When I reproject a raster from Mgi 6 to WGS 84 using Warp in Quantum gis it makes mistake ( about 380m). Is there any way to avoid this?
1
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1answer
114 views

Is it possible to fix a vector layer after I badly georeferenced a map? [duplicate]

Sorry in advance if I missed another question on this topic. I searched for everything I could think of, but I didn't find anything with a solution to my problem. I am quite new to GIS tools and ...
2
votes
2answers
268 views

How to batch-process georeferencing of rasters (prelude to animation)?

I have many (10k) raster files, all with identical size and pixel dimensions, which need to be georeferenced. I would like to georeference one of them manually, using either QGIS or GRASS, and then ...
0
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0answers
219 views

QGIS WMS didn't show georeferenced tiff

I try to reference image and use them via WMS. Chouse project CRS to EPSG:900913 Add OpenStreetMap source using gdal wms <GDAL_WMS> <Service name="TMS"> ...
0
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1answer
109 views

Can you use a large file directory of jpgs for without georeferencing

I have a large map data set of 256x256 jpg images. The file directory is organized by /map_type/zoom/x/y.jpg. I have 12 zoom levels and each zoom level directory has 2^(2*zoom level) images. I have ...
3
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3answers
108 views

How to match air photo to existing vector layers on Mac OS?

I'm trying to add an air photo to a project and match it to existing data. CanVec data is mostly based on the old CIA dataset of the 60's and is hopelessly out of date, but the roads are up to date - ...
6
votes
1answer
298 views

ISIS to GDAL to QGIS: Georeferencing Mars Images

I'm trying to use QGIS to view some images from the Mars Reconnaissance Orbiter Context Camera. I use ISIS3 to download the images and convert them to mapped .cub files, following the instructions ...
2
votes
1answer
187 views

Why are JPG files invisible in Georeferencer?

I want to georeference a jpg file (map) with QGIS 1.8.0 on a Windows 7 (64 bit) machine. The georeference window opens, but the map is not visible. When converting the jpg file into a tif file (e.g. ...
1
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1answer
222 views

How to Georeference a tiff with correct coordinate system

I am having difficulty in georeferencing an existing tiff (already has georeference information - but is out of alignment). Using the georeference plug-in I can create the map's GCP in the 4 corners ...
1
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0answers
153 views

Question about geotiffs

My colleague and I are georeferencing a bunch of .tif images. After each image, we'll click "update georeferencing". The resultant .tif files are different between our computers and I'm trying to ...
3
votes
2answers
186 views

Layer not aligning after georeferencing using BC Albers

I'm currently having trouble with the georeferencer... after what appears to be successful georeferencing, the map image layer does not align to the vector data. I'm trying to use BC Albers ...
4
votes
1answer
277 views

Problem converting georeferenced jpgs to geotiff - image is shifted/warped

I have hundreds of georeferenced jpgs in ArcGIS 10 that I need to convert to geotiffs. I'm trying to use GDAL translate to create geotiffs from them. Everything works great except that the ...
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votes
2answers
229 views

Geocoding raster map in ArcGIS 9.3.1 [closed]

How I do raster map geocoding? I have raster image and I am using ArcGIS 9.3.1 so how its' possible?
1
vote
1answer
576 views

Illustrator to QGIS workflow for vectors

I vectorized a map in Illustrator and would like to import it to QGIS now. I know I must use DXF for that purpose but when I convert the DXF to SHP with the QGIS plugin it is not georeferenced which ...
3
votes
0answers
739 views

How to use Scale tool when Georeferencing Raster in ArcMap?

I'm georeferencing a bunch of maps in ArcMap 10.0. The Shift and Rotate commands are pretty easy to use, no problems there. But whenever I use the Scale command, the image completely changes ...
5
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1answer
210 views

How do I georeference a ski map?

I have a map of a mountainous landscape, http://skimap.org/data/989/60/1218033025.jpg. It contains a number of known points, the lat-longs of which can be easily found out using google maps. I wish ...
4
votes
2answers
2k views

Which coordinate system and projection shall I use for georeferencing google map image in ArcGIS?

I have saved Google Maps image (not Google Earth) of area at latlon(17.692437,83.218689) by some method in jpeg format. It is an exact snapshot of the Google Maps. Now I need to geo-reference it to ...
1
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0answers
196 views

GeoTiff.lib: TiePoints only without ModelPixelScale do not get georeferenced in QGis

I have an image that has been georeferenced (geotiff.lib) by more than 3 tie points (x y 0 long lat 0 ...) and added following geotiff keys GTIFKeySet(gtif, GTModelTypeGeoKey, TYPE_SHORT, 1, ...
1
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0answers
43 views

Spatial adjustment for vector shp files in QGIS [duplicate]

How to do spatial adjustment for vector shp files in QGIS? I have a set of 4 cadastral maps of adjacent locations. I have converted them form DWG to DXF and then to vector shapefiles. They are not ...
2
votes
1answer
107 views

Determining the transformation between a satellite image and long/lat

I'm trying to overlay some data onto a satellite image of the UK. The image is a hi-resolution version of the image below (originally from dundee university): ...
1
vote
2answers
321 views

Why is Format of output data grayed out on Save As dialog for Rectify?

I started georeferencing and I could not save my new "rectify" file, I don't know if is because of the raster or I did something wrong. Then I find out that my control layer is not accurate, it ...
2
votes
2answers
164 views

Does QGIS georeferencing set to magnetic or grid north for British National Grid?

I have just been georeferencing a map on QGIS using British National Grid and it is not lining up with the vector maps I downloaded from OS. I used the 'From map canvas' option and used 'Linear' ...
8
votes
3answers
4k views

Is it possible to georeference an existing, un-georeferenced pdf?

I was wondering if there was anyway to georeference a pdf directly without first converting it to an image. I have access to ArcGIS 10.1 but haven't been able to find any information that would ...
2
votes
2answers
1k views

How to georereference a TIFF file which has already a spatial reference?

I have a TIFF file of Poland and a self drawn vector map of Poland. The vector map has no spatial information. I am intending to reference the TIFF exactly to the shape of the self drawn map. My ...
6
votes
1answer
4k views

Georeferencing a shapefile with ArcGIS 10.1

I have a shapefile with some polygons that I would like to superimpose to a raster image, but unfortunately they don't match perfectly due to the reference system the shp has been created with. So, I ...
0
votes
1answer
231 views

How do I add a Corel Draw map as .dxf file to QGIS and how do I georeference it?

I have a vector data map of Poland, which I exported from Corel Draw. I can display the map in QGIS. At first the boundaries and subdivisions are only displayed as lines, after saving the data as ...
5
votes
1answer
559 views

Calculating distance in WGS84 (MySQL and Geoserver)

Here is the environment in which I work: An application using geo-referenced data Database MySQL 5.5, storing georeferenced points A Geoserver server, connected to the MySQL database Here is the ...
2
votes
0answers
119 views

Install Georeferencer Plug-in QGis 1.7.0 OS X

I'm trying to install the Georeferencer plug-in in QGis 1.7.0 on Mac OS X (10.5.8). However the plug-in doesn't show up in the list. I have used "enable 3rd parties directory" and I have checked ...
2
votes
2answers
236 views

QGIS' georeferencer layer doesn't appear?

I use QGIS 1.8.0 for Linux, and I want to draw roads manually on the map. So according some tutorials, I use Raster>Geoferencer>Geoferencer to import a bitmap image including roads, and set ...
2
votes
5answers
657 views

How to find coordinates for a lot of locations based on the town or village name?

I have got an Excel spreadsheet with roundabout 15,000 locations, which are only identified by the towns or villages name and the country. I am intending to present these on a world map. Therefore, I ...
4
votes
2answers
1k views

Display Georeferenced Images on Android

I'm looking for an Android application (best would be Open Source), that can display georeferenced images on top of a map (Google, OSM, ...). By Georeferenced I mean that the images four corners are ...
9
votes
2answers
571 views

How can I improve my Georeferencing results?

Background This is my second question related to georeferencing naked raster maps in order to re-visualize them on different coordinate systems and in conjunction with other data layers. The previous ...
2
votes
0answers
161 views

How to georeference an areal photograph given known coordinates of the four corners and center of the image

First, let me say that I am new to this field. I have an existing image/video viewing application. My primary goal is to implement an efficient method to determine the latitude and longitude of any ...
2
votes
1answer
365 views

How to georeference using Latitude and longitude in QGIS?

I'm trying to georeference a picture using Latitude and longitude. The points are these: top-left: (116.30950927734372,39.970805680527725) top-right: (116.35620117187497,39.970805680527725) ...
1
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1answer
305 views

How to convert images from the South African co-ordinate system to WGS84 lat/long?

I have a number of orthophotos for an area in South Africa, but they are projected in the South African co-ordinate system which measures a location in meters from a central (uneven) meridian. These ...
2
votes
2answers
367 views

How to create a “Datum-less” projection in QGIS?

I want to use QGIS to do some georeferencing and image registration. On ArcMap10 I can define an "Unknown Projection", basically a default metric grid, and use it as a grid for georeferncing. In QGIS ...
3
votes
3answers
523 views

DXF to georeferenced SHP

I know how to set projection and georeference bounds of scanned TIFF file, by using gdal, but I don't know how to do the same for vector file. For example I georeferenced TIFF file by using this ...
5
votes
1answer
349 views

Determining Natural Origin for a GeoTIFF file (Lambert Conic)

I am trying to display an existing GeoTIFF file (from the FAA WAC set) in an application that requires the GeoTIFF NaturalOriginLongitude tag (FalconView 5.1.1). There are some older files in that set ...
9
votes
2answers
221 views

Does a Scanned Map have to be georeferenced in the projection of the original Source?

I have a historic paper map for the Indian Sub-continent which has been scanned. The Map is in Albers Equal Area Conical projection, and has the latitude and longitude grid on it. I was trying to ...
1
vote
1answer
134 views

Taking a 'custom' map and transforming its x/y co-ordinates to 'real' long/lat co-ordinates?

I was wondering if someone could help me out with a little project I'm working on. I'll try to describe what I'm trying to achieve - if it doesn't make sense, please let me know. I have in front of ...
0
votes
0answers
299 views

Why is “Convert Graphics toe Features” grayed out in a dataframe that has georeferenced layers?

I have brought two graphics, a species range and a heatmap, into a dataframe and georeferenced them using control points. I rectified them and now I want to clip one with the other but I can't get ...
7
votes
2answers
112 views

How to keep track of changes to geo-referenced data and maps?

At my company we are starting to get more serious about keeping track of changes to our geo-referenced data and maps. I'm looking into this and am wondering how people do it at other companies. We ...
2
votes
1answer
157 views

Is it possible to rectify an aerial photo with known control points in 3d, in QGIS?

Bonjour, Peut-on avec Quantum GIS redresser une photo aérienne avec des points caractéristiques connus en 3D (XYZ) ? -- Translation: Hello, Is it possible to rectify an aerial photo with known ...
1
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0answers
70 views

Create 6 band IMG file with GDAL out of two JPG files, one with WorldFile coordinates

I have two JPG files 1 ortomap: http://imageshack.us/photo/my-images/703/ortofoto1.jpg/ with WorldFile: 0.683772574816354 0.000000000000000 0.000000000000000 -0.683739485024190 ...
1
vote
1answer
246 views

Georeference Raster File with WorldFile into an aerial photo using GDAL [duplicate]

Possible Duplicate: How can I transform a georeferenced JPG to a georeferenced TIF? UPDATE:Corrected link I must note that I am new to GIS so pleas be understanding. PROBLEM: I have a ...
2
votes
2answers
486 views

How to georeference a LANDSAT scene in QGIS 1.8?

I tried to georeference a LANDSAT scene in QGIS 1.8 but I failed. My first question is Can I use geografical coordinates as x,y coordinates of control points? or I need projected coordinates (from ...
1
vote
1answer
370 views

Georeferenced Tiffs displaying in the wrong location & scale when updating ArcGIS 10

I'm working on a project which involves georeferencing a large number of .tiff files to digitize data from them. All the tiffs which have already be georeferenced where done with ArcMap 10.0 without ...
0
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0answers
186 views

QGIS Georeferencer and Coordinate Systems

I'm having an issue with Ubuntu and Windows versions of QGIS where the georeferencer does not properly assign the coordinate system to the output raster. When I assign the output CRS to 'EPSG:900913 ...
0
votes
1answer
230 views

How to georeference CAD drawings without preserving aspect ratio?

I have a CAD drawing (DWG) format that I would like to georeference to my basemaps that are projected in UTM coordinates. This drawing is done to scale without any geographic referencing. In ArcGIS, ...
3
votes
1answer
363 views

Georeference problem including EPSG 102067 projection

I'm Qgis user from Czech Republic. We have a spatial national coordination system (Krovak system) having positive X axes pointing to the south and positive Y axes to the west. Many geographical ...