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

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7 views

Assigning latitude and longitude to a particular pixel in satellite image

Pixel of a satellite images can be assigned latitude and longitude, but how this is done as each pixel represent certain area depending on the resolution of image that can be too high to assign ...
3
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1answer
614 views

Georeferencing multiple rasters to World files in ArcGIS for Desktop?

I've got exactly 56 tiffs to georeference. Each raster has its unique TFW world file. I'd like to automate this process. Each raster has it's unique name which is consistent with world file name (eg. ...
2
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0answers
38 views

How to automate the georeferencing of aerial photos?

I have tried using the "automatically place Passpoints" tool on the georeferencing toolbar in ArcGIS 10.3.1 but this only seems to work with Aerial photos which are near to identical. I have many ...
5
votes
1answer
997 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 ...
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0answers
18 views

Tips on building GeoReferencing web app with MapBox?

So I want to build a web app using MapBox GL JS that allows users to Upload an image (preferably any kind) Position it on to a map The image is then uploaded to MapBox as a GeoTIFF and is added as a ...
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0answers
12 views

Georeference data for Africa [on hold]

Is there georeferencing data for Africa in CartoDb. I am looking specifically for Nigeria. How do I access that data?
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0answers
38 views

Georeferencing raster images with ArcGIS Desktop 10.2

I am trying to georeference as built plans (raster scans) but they do not show on the georeferencing tool bar (drop down menu) to enable editing. I am using WGS 84. How do I fix this? I am using ...
1
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0answers
19 views

Georeferencing an NDVI (JPEG) image in QGIS

I am struggling to georeference a NDVI image. The image is a JPEG, how would I go about this? I am using QGIS
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0answers
7 views

Mosaic georef is a few pixels off for half of my image, how to georeference?

I have two sat. images from the same platform on two different dates. The images overlap each other nicely, but I cant get them to accurately mosaic into one raster image. I merged the two photos ...
2
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1answer
54 views

Can FME georeference dwg CAD files?

Due to problems with other software, I am trying to find altervative software in order to georeference DWG Images without a defined coordinate system attatched to them. They are digitized to scale 1:1 ...
2
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1answer
22 views

How to georeference city data set with geoid and objectid as only location data

I am new to Cartodb and ran into my first hiccup. I was trying to import a data set of walkable food access in Philadelphia that is available from Open Data Philly. I can't figure out how to ...
0
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1answer
25 views

Why do collinear ground control points create larger residuals?

When georeferencing a raster image of a long corridor, why do collinear ground control points cause larger residuals? Say I am using the georeference function in ArcMap, and I have 6 ground control ...
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49 views

QGIS 2.10 Can't load georeference plugin?

Apparently my problem was already present in older versions of Qgis. I don't know how to fix it, knowing I have a Linux system (Fedora 23). Somethiing similar here : Where to download QGIS 2.10? So, ...
2
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0answers
48 views

How to Georeference in QGIS 2.12.1 Lyon

I used to be able to Georeference in QGIS but now I can't. These are the steps I go through. At the end of it nothing happens. No layer is added to my Layers Panel and no document is created in the ...
3
votes
1answer
197 views

Georeferencing Image using saved Link Table from another Image?

I had a scanned map that I did did a georeferenced a few weeks ago and saved the link table. Now I have two more scanned map that need to do the same thing. It is the same area and one of them I did ...
0
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1answer
59 views

How to calculate a map scale with bounding box, width and height?

I have a map that will allow the user to select or slice images/pictures out of it. As example a map width is 1200px * 1200px and the user selects say 700px x 700px square (note: aspect ratio is ...
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1answer
309 views

How to link 2 different images in eCognition

I'd like to link 2 different images in eCognition to find the same pixels on both images. The images have same projection (geog lat/long). How can I do this? Thank you so much
0
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1answer
21 views

Importing non-geocoded jpeg into active window of ArcMap Data frame?

Currently when we draw a new subdivision into our GIS, we snip a .jpeg of the platted subdivision and add it to ArcMap. The un-referenced jpeg is simply dropped out in the middle of nowhere and we ...
3
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3answers
2k views

Georeferencing to x y coordinates with one lat long origin?

We are running parallel transect lines for a survey, which will roughly cover a rectangular area. When making the transects, we will periodically capture spatial locations of features and events we ...
3
votes
1answer
49 views

How to create new shapes based on partial existing shapes and georeferenced scan?

I am trying to generate a new shapefile in QGIS based on a georeferenced scanned map of colonial powers in Africa and the NaturalEarth country shapes. The overlay of the georeferenced TIFF looks quite ...
2
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0answers
23 views

QGIS tiff image loaded but not visible

In QGIS I used the Georeferencer on a jpg image I had prepared in Gimp. But when I load the resulting tiff image into my QGIS project it is invisible, even though an image viewing program can show it ...
1
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1answer
51 views

QGIS Georeferencer - Georeferenced Image Issue

I'm trying to georeference an aerial image of a site over it's exact coordinates using WGS 84. The same coordinate reference system is used on the settings. I'm not sure what to do from here, is there ...
1
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1answer
26 views

QGis's Geoferencer plugin isn't able to paste text that has been added to clipboard via mac's “pbcopy” terminal command [closed]

I recently wrote a little script that used mac's pbcopy shell command to dump some text into my clipboard for use in the QGis program. For some reason I'm not able to paste stuff that has been ...
1
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2answers
232 views

Worsened image quality and false colours after georeferencing

When I georeference a map of vegetation types (about 20 colours, each representing a certain vegetation) the quality of the georeferenced map is really bad and some colours have changed (e.g. black ...
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votes
1answer
29 views

How to georeference a .jpg image with only a scale bar and no basemap

I have a building blueprint image that I need to calculate the sq ft for. However I have no reference or basemap to manually georeference in ArcMap. There is a scale bar on the image. How can I use ...
4
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1answer
42 views

Is it possible to locate a specific marker point on a raster using python and use that location for georeferencing

I have several scans of the same map, which I would like to georeference. I can not use arcpy.WarpFromFile_management(...) as the rasters are slightly different due to scanning. Is there a ...
2
votes
1answer
51 views

How to use a png image as a correctly georeferenced background in order to trace lines from it?

I have a png image which looks like this and has some lines which I need to trace (the green and red lines): The coordinate system of the map from which the image is taken is EPSG: 3034. How can I ...
1
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1answer
53 views

Georeferencing vector dataset in QGIS?

This question may seem as it was asked before, but I think I just don't use the right terminology. Here's my problem. I'm an archaeology student trying to make an internal map of a prehistoric ...
1
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1answer
57 views

Georefencing angled geological cross-section maps in QGIS?

Is it possible to georeference this type of angled cross section, preferably in QGIS (Section-II in the image) ? I am very much new to this type of georeferencing. Googled & couldn't find a ...
3
votes
1answer
53 views

Geo-Referencing an image from google maps with gdal_translate

I am trying to geo-reference 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 ...
3
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0answers
30 views

QGIS Georeferencer is stretching image

I'm trying to Georeference an image. I've followed the guide from QGIS, but for some reason, it's stretching, and offsetting the image from the points. For example, my input of the southwest corner ...
1
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1answer
73 views

libLAS georeference las file and update header

I am just starting to use libLAS and I had a small issue. I have next code to generate a las file with georeferenced points: std::ofstream ofs; liblas::Header header; liblas::SpatialReference srs; ...
7
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1answer
144 views

Georeference raster in non horizontal plane

We have raster data which is generated from (vertical) walls. We would like to keep this data in a postgis database and have the spatial reference encoded "the most accurate way". Currently, they are ...
1
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2answers
178 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 ...
0
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0answers
26 views

ArcGIS stops responding during Georeferencing Save?

Im using ArcGIS 10.2. I had an ealier problem that I think I found an answer to here while georeferencing an aerial photo. My current issue is that whenever I go to rectify the georeference points, ...
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0answers
34 views

Visio to CAD to GIS, How to geo-reference? [closed]

I have CAD file converted from a MS Visio diagram, representing power line cables. Data source has no spatial reference. I converted into shapefile and now I am trying to georeference the vector ...
0
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1answer
49 views

script for auto registration

I have a large list of raster images (>600) I would like to automatically georeference to a source image. I can do this in ArcGIS 10.2 using the Auto Registration tool for each image but looking for ...
0
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0answers
56 views

Georeferencing image in ArcGIS for Desktop?

I had to make a custom base map of Manhattan, so using adobe illustrator I traced over a blank map and added the color/features I wanted. How do I go about Geo-coding Georeferencing it? I have ...
0
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1answer
50 views

Georeferencing PNG in ArcMap based off of data frame corners?

First, in Arcmap I set the data frame exactly equal to the page layout (2'hx3'w) and exported my hillshade, DEM, etc one after the other from layout view so that they were all the exact same size and ...
1
vote
2answers
51 views

Georeferencing Raster+Shape file using different Raster of same region?

In ArcGIS, I inherited a database of points in a raster image of Mars, each point indicates a crater occurrence. These are around 60,000 points, all of them in a shapefile. Both the raster and ...
6
votes
1answer
137 views

Using a geo-referenced image as an overlay to display markers on floorplan

I've created a tool based on the Google overlay tiler. This allows our users to upload a floor plan, adjust the position etc. using Google maps. Nothing fancy. We have a server-side job which creates ...
1
vote
1answer
41 views

How to get parcel polygons to match up?

I have county-wide parcels that don't match up. They are in the same feature dataset, have same projection etc. Is there a tool to get the borders/parcels to match? One layer of parcels seems to be ...
1
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0answers
43 views

Problem in loading map to Georeferencer in QGIS

I'm trying to load a map to the Georeferencer in QGIS using the approach from http://www.qgistutorials.com/en/docs/georeferencing_basics.html. I try to get the locality coordinates(lat/lon) of the ...
2
votes
1answer
23 views

Importing raster data with known lat/lon to QGIS?

I have a number of raster files with known latitude/longitude of the picture edges. What is the appropriate way to import such pictures in QGIS with correct coordinates? All the options that I can ...
5
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0answers
256 views

Why is QGIS georeferencer much faster on Windows than Mac?

I just went from temporarily using a Windows 7 machine with 4GB of RAM and no video card as far as I know. I'm now using a mac with 16GB of ram, etc. Its a much more powerful machine. However, QGis's ...
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0answers
34 views

QGIS as a pre and post processor for modflow

I want to find out how QGIS can be used as a pre-processor for modflow, i.e delineating the model boundary and boundary conditions etc. exporting to modflow for analysis, viewing and/or mapping the ...
1
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0answers
24 views

Importing geophysical information to QGIS 2.10 Pisa [closed]

I am using QGIS 2.10 Pisa to georeference geophysical survey information. When I import data I have black pixels around meaningful part of the image which I remove by setting the transparency to ...
3
votes
2answers
105 views

Ukrainian topographic map: projection and coordinates?

I need some help. I managed to get Ukrainian topographic maps for my project. I'd like to do the georeferencing in QGIS. The problem is that I don't have a clue what projection was used and how to ...
1
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1answer
446 views

Methods to accurately georeference 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
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1answer
41 views

Georeferencing DWG files on imagery which is hard to see through (e.g. trees)?

Here I have a few campgrouds that I have for are in DWG files that I am going to georeference them. I have no problem with that however; some of these campgrounds I need to georeference on the imagery ...