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

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10
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1answer
5k views

Georeferencing using GDAL?

I have a .tiff image that I am trying to overlay in google earth. For that I require to georeference it first. The image projection is UTM with NAD83 as datum. I know the lat/long of the four corners ...
0
votes
0answers
10 views

Choosing georeference parameters? [on hold]

In using QGIS's georeferencer, I must choose the "transformation type" and the "resampling method". Can you direct me to a good, understandable discussion on how to choose these parameters for ...
0
votes
2answers
4k views

Converting longitude and latitude coordinates 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 ...
3
votes
0answers
352 views

QGIS : transformation types in geo-referencing

I am a beginner in geomatics. I am trying to georeference some images in QGIS. I would like to understand what is happening behind the different transformation types (linear, polynomial, Helmert...)....
1
vote
1answer
36 views

QGIS “Raster->Georeference” menu item not showing up

I am using QGIS 2.12.0 Lyon. I have installed a plug-in called "Georeferencer GDAL" and the version of that plug-in is 3.1.9 . [I am working on a Mac which is running OS X Yosemite 10.10.5.] I am ...
1
vote
1answer
27 views

Fixing python error in QGIS Freehand raster georeferencer plugin?

I am using QGIS 2.8.9 stable release in the 32bit form on a Windows 7 64 bit compatible PC. I want to use the Freehand raster georeferencer plugin. It installs without difficulty but when I try to ...
0
votes
1answer
27 views

Auto-Create polygons from Geo-referenced PDF

Is it possible to automatically create polygons/features from a georeferenced PDF? I'd like to geo-reference an expanded view of the below linked pdf, and then have each of the tracts created ...
1
vote
2answers
277 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 ...
0
votes
0answers
15 views

Georefrencing a geotiff image using gdal and python [closed]

I want to write codes for georefrencing a tiff image using gdal and python by either using GCPs or another georeferenced image.
2
votes
1answer
46 views

georeferencing swisstopo print

when i tried to georeference a printout from map.geo.admin.ch, either the result got turned some degrees, or the height got compressed or both. using the helmert transformation gave me the best ...
0
votes
0answers
128 views

Georeferencing google earth historical images

I have been trying to raster and georeferenced an historical set of images from Google Earth but I am experiencing issues after done the first one properly. I save 4 images from Google Earth of the ...
0
votes
0answers
14 views

AutoCAD Map 3D Manual [closed]

is there any free useful reference about working with Auto Cad Map software? Important Topics that i need them : Geo-referencing Attribute Table and how i can create them in this software ...
0
votes
1answer
74 views

Creating .geo extension in ArcGIS for Desktop?

I have to create a georeferenced image from ArcView/ArcMap in the .geo format. I can't find much on the web on this.
0
votes
1answer
222 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 ...
0
votes
1answer
35 views

changing projection hides raster

I have a map georeferenced in georeferecer plugin in QGIS. I have loaded it in qgis. It shows strangely (wrong aspect ratio than I expect). I am changing projection (bottom right "OTF" projection) ...
1
vote
0answers
36 views

QGIS: georeferencer, resolution-dependent behaviour, why resolution is negative

I am trying to georeference sovet military maps from maps.vlasenko.net. I have manage with one, but to my surprise I am failing badly with georeferencing a second file (M33-3 map). Let me go piece ...
1
vote
2answers
50 views

Speeding up (automating) QGIS georeferencing process?

I georeference a lot of maps with QGis using a combination of visible street intersections on paper maps and right clicking on those intersections inside of maps.google.com and clicking "what's here?",...
2
votes
3answers
8k views

How to add georeferenced TIFF to AutoCAD 2010

I have a ~6GB georeferenced (from ArcGIS) .TIFF satellite image that a colleague wishes to add to AutoCAD 2010. He wants it as a base layer for digitising features from. I have searched forums but ...
2
votes
0answers
27 views

Automated georeferencing based on topological point pattern matching in ArcGIS

I have a lot of building plans (PDF/PNG format) which I would like to automatically georeference. I have the base map "OS Mastermap Mono", which is use for a lot of the building plans. If I use ...
2
votes
1answer
187 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 ...
0
votes
1answer
36 views

Determining coordinates for CAD file using ArcGIS for Desktop?

I have a CAD file of a building and I want it to be replaced on Google Maps with coordinates. The DXF-file is on a local coordinate system (undefined). I convert this file to SHP-file for editing. I ...
1
vote
1answer
58 views

Raster to vector data generation problem

I am trying to generate lee multiplier zone (see map please) from raster data using georeferencing and digitization. See this map only contains THREE layers! Lee Multiplier Coastal boundary Cities ...
0
votes
1answer
184 views

Georeferencing in ArcGIS - Zero-Order (Shift)

Zero-Order (shift) transformation is meant for rasters that only require shift, which as i understand it means moving or translating the image. Two questions: Does it mean that two or more control ...
9
votes
1answer
661 views

Georeferencing LAS files in geographic coordinates (lat/lon) or in cartesian (projected) ones?

First of all, I am a newbie in GIS. I have a lidar point cloud with GPS and telemetry data associated. Then, I transform coordinates of every point to an ECEF coordinate system and finally I ...
2
votes
1answer
45 views

Digitizing jpeg image or georeferencing it first?

I'm a new learner when it comes to QGIS. I have a jpeg image and I want to convert it into a shapefile. The problem is when I polygnized it, the resulting image is inverted. So i decided to just ...
1
vote
1answer
111 views

Shifting LiDAR point clouds that have been incorrectly georeferenced

I am new to LiDAR and have never been a part of the LiDAR data pre-processing stage and hence, this question. I have two LiDAR point clouds (.las files) of a densely forested area that were captured ...
5
votes
1answer
1k 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 ...
1
vote
0answers
65 views

Problem aligning historic map of Poland [closed]

I have downloaded a historic map of Poland. I am having a problem aligning it to a modern map. I have tried various methods and coordinate system using over 50 points, but nothing works. It gets close,...
1
vote
1answer
56 views

How do I get dwg file in Autocad Civil 3D to align with a georeferenced shapefile and attach coordinate system?

I am working on a project mapping Rockingham castle for a event help there in August and am mapping the layout and camping area. I'm looking at taking over from the person previously performing this ...
0
votes
0answers
12 views

Cropping out overlapping raster areas from old maps?

I am trying to take out the white bordered areas from my crop lines from multiple PDF maps I georeferenced and now exist as rasters. My goal is to mosaic or merge them all together to have a seamless ...
3
votes
1answer
46 views

Which CRS would be the most appropriate to georeference a map of Egypt?

I'm trying to georeference a geological map of Egypt from 1981, but I don't know which CRS to chose, either the transformation type nor the resampling method... And once the georeferencing of the map ...
4
votes
1answer
96 views

Georeferencing Himawari-8 in GDAL (or other)

Does anyone know the appropriate project information to georeference (and hence reproject) Himawari-8 AHI data in the IR? The images are 5500x5500 pixels. Currently I try these: ulx=-5570248.832537 ...
0
votes
1answer
38 views

How to load and reference historic mapping

I have recently started working with QGIS having used ArcView for several years. I am unsure of how to go about inserting historical maps which have no referencing data. I think it might be ...
1
vote
0answers
43 views

QGIS georeferenced image does not apear in the map area

I'm having issues with some georeferenced images in QGIS 2.10.1-Pisa. I generally georeference PDF's of new land subdivisions over aerial photos to get the layout of the new subdivision, generally ...
3
votes
1answer
19 views

georeferencing raster data with unknown CRS

I’m new to QGIS and georeferencing raster data. I have a raster dataset with unknown CRS. The coordinates for goerefencing the raster data with reference points (x = 589 Y = 1483 / x = 500 Y = 1500) ...
1
vote
1answer
50 views

Building georeferenced GeoTIFF from mbtiles automatically?

I want a georeferenced raster.In that way I don't have to georeference this raster manually . I know that geotiff has the georeference inside it , I got the mbtiles of the map how do I build the ...
3
votes
2answers
107 views

How georeference a dxf file in QGIS 2.14?

In Illustrator I exported a PDF as dxf and inserted it in QGIS as Vector and obtained 2 layers as points and lines but it is misaligned and in a unknown location. I know georefecence a raster file, ...
2
votes
1answer
45 views

Georeferenced TIFF to Google Earth?

I have aerial view images (.TIFF) which I have georeferenced using ArcMap 10.4. What I am trying to do with the images is export them with the georeferenced data attached and import them to Google ...
0
votes
3answers
686 views

Georeferencing window won't open QGIS 2.4

I had the georeferencer window open in QGIS 2.4 while project was running, I accidentally closed the Qgs document with the georeferencing window open (worked absolutely fine till then). When I opened ...
2
votes
1answer
137 views

QGIS 2.14 Georeferencer Issue

Am having an issue with the QGIS Georeferencer - I start with a fresh canvas but for some reason, the points always end up shifting a great amount (see screenshot). I've double checked my points, and ...
9
votes
4answers
178 views

Creating photogrametric point cloud of an object from distributed photographs, here: Making accurate 3D model of building using UAV imagery?

Is there a way of creating a photogrametric point cloud from a set of densly distributed photographs of an object? Application: I am trying to investigate if creating a 3D model (point cloud) of the ...
4
votes
2answers
66 views

Options for Aerials QGIS 2.10

I'm looking for options to add aerials to my QGIS Project. The OpenLayers plugin doesn't work (it says it's only available for versions 2.0 - 2.2), so I'm stuck moving from ArcMap to QGIS. Is there ...
2
votes
4answers
404 views

How do I eliminate the black border on a georeferenced map layer?

I have geo-referenced several scanned maps. Theses are placed side by side on separate layers in QGIS. They overlay other older maps of the same areas. Georeferencing caused the maps to have black ...
2
votes
1answer
352 views

Georeference multiple raster layers of same area at once or identically

I have many raster layers that I need to georeference to my existing vector layers. Data types vary between 8 bit unsigned, 32 bit float, and bit 64 float. All have the exact same extent, cell size, ...
1
vote
1answer
40 views

Spatially matching Landsat images in ArcMap?

I'm trying to look at the desiccation of a lake over a number of years using images from different Landsats. However when I import the different years into arcmap they are completely unsynchronized. I ...
0
votes
1answer
17 views

Compute GCP values for gdal_translate in a PNG image

I am using the incorrect GDP for gdal_translate based on gdlainfo command line since image is offset from correct location. Image is at correct location when I use QGis GeoReference using my clicked ...
0
votes
1answer
30 views

Managing Many Georeferenced Large Files in ArcMap?

Does anyone have any ideas on how to best handle many large georeferenced files in an ArcMap Document? I have somewhere around 250 individual historic aerials (none being in the same place or from ...
2
votes
0answers
26 views

Tiff will not update georeferencing

I am having a problem georeferencing. I have a photograph (.tif) that will not save georeferencing. When the .tif raster appears on the table of contents, there is a ":0" added to the end of the ...
1
vote
3answers
485 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 ...
2
votes
1answer
57 views

Georeference automaticlly in QGIS

In ArcGIS the function called "Auto Registration" and it can automatically georeference raster Is there a way in QGIS to do the same? I seek in the transformation settings and in the setting ...