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

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51 views

Suggested Workflow for Generating NITF (w/headers) using Nitro in Python

It seems that there is no real suggested workflow for generating an NITF file from a georeferenced, validated tiff image. Here are my inputs: Pyramid Tiff Image - georeferenced MBR (minimum ...
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36 views

Vectorized a historical soil map advice

I received a PDF file of a soil map in the Middle Rio Grande Valley near Albuquerque, New Mexico however it is dated in 1914. I was able to split the north and south because it came in one map and ...
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1answer
136 views

How to exactly georeference in QGIS

When I georeference a raster image in QGIS, it's always a bit displaced as in the attached image (the cyan polygon is the template, the red border is the georeferenced image), although I try to set ...
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2answers
86 views

How to find the coordinate system of an existing Map in arcGIS using VB.NET [closed]

I already have a georeferenced base map loaded in ArcMap. I want to find the spatial reference of this map and assign the same coordinate system to a polygon that I created. I can not get a start with ...
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46 views

How to preserve GCP's after gdalwarp

I'm trying to figure out how I can preserve my GCP's after a gdalwarp. I need the georeferenced GCP's data, so I can calculate the Root Mean Squared Error. Is there a way to preserve this data, and ...
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1answer
77 views

How to overlay a jpg onto a google earth image?

I have produced a model from an online engine , and it is in a google earth picture. I want to georeference the below picture and apply the boundaries here on my google earth image. I'm using QGIS2.2. ...
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1answer
83 views

Georeferencing CAD Files and Creating Geodatabase

I'm hoping this is an easy question to answer. I have georefrenced a CAD data set to an orthophoto that was projected in NAD 83, and turned it into a GDB. Even though the GDB is not projected, is ...
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1answer
62 views

qgis's georeferencer renders my white map with a translucent blue tint, can I prevent this?

I'm running QGIS 2.0.1-Dufour on MacOSX and when loading a PNG or TIFF into qgis as a raster its always getting rendered with a blue tint. Here's what it looks like before being loaded into QGis's ...
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3answers
114 views

Add locations individually in map view to existing table rows?

(Edited for clarity, sorry!) I have a table in which many records have long/lat info, but many others do not. In other words the locations for those records are currently unknown. Therefore there ...
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45 views

Does Collada allow to georeference the 3D coordinates within a DAE file?

Can I assign lat/long/height values to each vertice of a Collada 3D model?
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1answer
162 views

How to upload a list of 5-digit zip codes to CartoDB?

I'm playing around with the free version of CartoDB right now. Trying to upload both a CSV and excel document with a list of 5-digit zip codes. I have received a "there was a problem georeferencing ...
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1answer
76 views

How to choose a coordinate reference system

I have a jpeg image of a reserve's layout and would like to use it to plot animals movements on i.e. GPS points. I have no idea which coordinate reference system to choose during the "georeferencing" ...
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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, ...
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1answer
77 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 ...
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2answers
107 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 ...
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1answer
69 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 ...
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2answers
99 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/ ...
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1answer
71 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 ...
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1answer
76 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 ...
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1answer
150 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 ...
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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?
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24 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 ...
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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 ...
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1answer
187 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 ...
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1answer
142 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 ...
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3answers
348 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 ...
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1answer
224 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 ...
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1answer
46 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 ...
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1answer
190 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 ...
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2answers
55 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
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1answer
149 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 ...
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2answers
104 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 ...
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1answer
76 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 ...
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1answer
242 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 ...
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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 ...
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2answers
150 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 ...
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1answer
79 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 ...
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1answer
754 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). ...
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1answer
226 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 ...
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1answer
40 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 ...
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159 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 ...
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1answer
39 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 ...
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1answer
299 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 ...
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2answers
540 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
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1answer
100 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 ...
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1answer
92 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 ...
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1answer
78 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 ...
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41 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.
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1answer
47 views

Missing Georeferencer

I installed Qgis Master 64 bits on win7 64 16gb of ram and I am unable to locate the georeferencer. All other Gdal application are there, Gdal is active, but no georeferencer. I tried yesterday, ...
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2answers
130 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 ...