Questions tagged [georeferencing]

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

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64 views

How do I get contours from a scanned map? [duplicate]

I have a scanned map which is a .tif file. I have geo-referenced it, and now I want to render it in 2.5D. Can i do this in QGIS? The ENC file is not available for the map I am using. The map already ...
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1answer
339 views

Displacement when clip raster by shapefile

I run a script to clip raster by shapefile. Even with layers own the same crs (epsg: 4674) the output raster be displaced. I didn't find out in my script what is caused the error. Here is my code: ""...
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2answers
684 views

Georeferencer QGIS not working?

I am trying to georeference a .png file. After inserting all the data I get the following error "Transform Failed: Failed to compute GCP transform: Transform is not solvable." What can be the ...
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1answer
119 views

Does cropping and adding an alpha layer to a raster map yield better georeference results?

I have a collection of nine high-resolution map scans illustrating former borders between two nations. The scale is about 1:13,265 for each of the nine images. I want to georeference these maps using ...
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1answer
102 views

Georeferencing Mosaic in ArcGIS Desktop?

I have a problem in my thesis, i georeference a lot of photos and after that i create a mosaic. But now, i know the ortho is shifting 5 meters. Is possible to shift the mosaic without creating ...
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0answers
224 views

jpg addition to qgis

I'm having lots of trouble with my jpg showing up on my qgis template. I have saved the image in the same folder as my .qgs file, so it should come with associated files. As you can see, the thumbnail ...
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1answer
93 views

Rotate pdf/raster - QGIS 2.14.0-Essen

I inserted a pdf (image) in my work. But the pdf is rotated 180 degrees... My objective is to georeferencing it. How can I rotate it prior to georeferencing it?
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1answer
399 views

Open Georreferenced MODIS L2 atmospheric data in python

i'm working with a MOD04 (atmospheric product) but i don't know how to georrefence the image in Python. I'll show an example of a code opening the Optical Thickness product #==========================...
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0answers
120 views

Georeferencer output placed in wrong location

I am using the georeferencer to align multiple Rasters. Out of 10 attempts 4 worked well, and the other 6 seem to complete, but it places the raster in the middle of the ocean (always in the same ...
2
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1answer
55 views

Aggregating georeferenced point data to conflicts site using R

I have a question with regard to joining to datasets. On the one hand I have information about the location of a conflict regarding its lat/long, radius, and area and how it changes over time. Here ...
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0answers
431 views

SVG to GEOjson with control points

I have few SVG files (maps) that I want to convert to GEOJson. On those SVG files, two markers (crosses) had been drown in order to georeference the layer. So I know the coordinates of those control ...
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1answer
77 views

Matching point data with non-traditional coordinate system to shapefile with coordinate system?

I'm working with in-situ data collected from several field sites that must be converted into points that lie within a separate layer of polygons. These polygons are the boundaries of the different ...
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0answers
47 views

Automatic geo-referencing options - mosaic dataset footprints? [duplicate]

I have 50 Jpgs that represent a route and I want to automatically georeference them. I have previously georeferenced 50 jpgs that exactly match the image extents and created a mosaic dataset. I would ...
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1answer
57 views

Make a GIS map searchable on ArcGIS Desktop

I have a georeferenced photo image. Each point in the map corresponds to the exact latitude/longitude on the ground. The map also has names of cities but I can't use those names for searching. Is ...
4
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1answer
171 views

Define Proj4 string for CANGRD dataset

I'm trying to georeference the .grd files provided here http://open.canada.ca/data/en/dataset/3d4b68a5-13bc-48bb-ad10-801128aa6604. The documentation states "The CANGRD grid is in polar stereographic ...
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2answers
965 views

Why do maps tilt after georeferencing?

So this is a scanned map of a portion of Morocco. This is the original map And , this is the map after georeferencing it This map is now giving me the correct coordinates for the positions on it , ...
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1answer
133 views

Georeferencing and mosaicking jpeg images using ArcMap with unknown spatial reference?

I have a series of large scale (almost 1:1), aerial jpeg images taken from a UAV DJI-FC350 drone camera. They have no spatial reference, but the images have their own GPS tags giving a single lat, lon ...
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0answers
42 views

Ground Control Points change when moving from one reference system to another?

In this question I'm interested just in the theoretical part. So, let's say we have such GCP in local reference system: (-2,14) (186,180) Label "Point 1", (-2,13) (211,6072) Label "Point 2", (-1,...
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1answer
176 views

Import GDAL_TRANSLATE IMAGE GOES-13

I have this questions, how to Import by GDAL_TRANSLATE IMAGE GOES-13? Whats is possible projection? Files: 1501201445G13I01.TIF Size is 14400, 12001 Coordinate System is `' Metadata: ...
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1answer
139 views

Georeference vector based on same data as raster?

It sounds complicated, but this approach would be quite simple. I'm just not sure, if I can solve my problem in this easy way. I have a raster image and a set of vector data, that are all not ...
1
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1answer
460 views

Georeferencing based on ArcGIS basemap?

I have a scanned image (tiff) of a historic map, with no information of the used coordinate system, which I want to georeference, to finally be part of a WebMap application with Leaflet. As far as I ...
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3answers
454 views

How to create a simple OSM map of San Francisco with a bounding box?

My objective is to create map of San Francisco, specifically [-122.5145, 37.8092, -122.3716, 37.7085]. Using my (older, 1.8) version of qgis and the open layers plugin, I can find the San Francisco ...
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0answers
68 views

QGIS - Layer missing polygons after pointsfile transformation

I'm using pointsfile transformation in QGIS for the georeferentiation of my layers. After the transformation the result some times has polygons missing like here: Why is this happening? How do I ...
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0answers
51 views

GeoWebCache pre-seed aerial imagery via WMTS as geo-referenced raster e.g. GeoTIFF/GeoJPEG2000

I have a large cache of JPEG files (700,000 tiles) that I've pre-seeded using a standalone GeoWebCache connected to a backing WMTS service. I'd like to build a visual database with Terra Vista and ...
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0answers
558 views

Georeferencing Control Points Aren't Saving

I have some CAD data that needs to be georeferenced. I create my first control point, and everything goes well, the drawing shifts to the correct control point. As soon as I try to create a second ...
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1answer
364 views

How to define projection of a raster file in ecognition?

I have a raster file with no spatial reference. How can I define a projection for the image in ecognition software for classification purposes?
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2answers
276 views

Georeferencing transformation types

I'm trying to georef old maps från 1960 that have clear boundary lines and my employer want an almost exact match with today's boundaries. But it's very hard with 1th, 2th and 3th transformation. ...
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0answers
65 views

Exposing function or transformation matrix that QGIS georeferencer develops to georeference raster?

The problem: Think of the London Tube Map. Logically correct, but physically inaccurate. I want to display such an arist's impression (un-transformed, so recognisable) on a mobile web site and have ...
3
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2answers
148 views

Accidently deleted layer from Layers panel of QGIS?

I accidently deleted a raster layer from my layers Panel (i used georeferencer to add it to my map) and i want to know if is there a way to get it back on my Layers panel without re-doing the whole "...
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0answers
117 views

Geo-referencing large PDF files when DXF doesn't work

I've a 4567kb PDF which won't load even into the georeferencer (stops responding) but a 1538kb one from the same source with the same encoding will. Why? If I drag it it then it loads but won't let me ...
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1answer
386 views

Georeferencing images and losing quality in QGIS?

I have several plans I need to georeference. They start out like this: But after georeferencing, the best I can get is this: Using these settings: Where did I go wrong?
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1answer
314 views

Georeferencing vector data to another vector in QGIS?

I have the latest version of QGIS Las Palmas 2.18 I am trying to georeference a vector data to another. I saw most people use VectorBender plugin but I don't seem to find it in plugins
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1answer
165 views

Georeferencing image for EarthExplorer?

I am quite new to QGIS and I am trying to do something which seems so simple but it won't work. I have looked for an answer and couldn't find any. So I dowloaded data imagery from EarthExplorer about ...
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0answers
34 views

Geolocation of a drawn point on printed map without scanning

I have a printed map of a district with several points on it that can be used as geolocation reference points. I have the shapefile of this map in QGIS. If someone draws a point on the printed map, ...
4
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1answer
320 views

Python GDAL: How to obtain dx/dy/residual errors for GCPs after gdalwarp usage

I've been developing my QGIS plugin for few weeks now. It's going to be pretty similar to well known GDAL Georeferencer plugin, but including few more helpful features. So far my code has been working ...
2
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1answer
210 views

Georeferencing CAD drawing against point data and/or raster image?

I am working on a project to identify households within certain buffer areas of a proposed water pipeline. I have raster imagery of the area of interest, point data for the households, and a CAD ...
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3answers
4k views

Georeference a pdf without losing image quality

My recent project is to impelent a custom and georeferenced image to a leaflet map. I finisehd my custom map using inkscape now having a .svg and a .pdf vector data. As far as i know my next step ...
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0answers
45 views

Georeferenced vector file to raster file problem [closed]

When I rasterize the vector file it keeps getting an error 6. How do I manually put a -3d,-a, or -burn value? I am only a beginner. Feel free to ask for clarifications about my problem.
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1answer
128 views

How to keep the georeferencing data from ArcGIS when importing rasters into Erdas imagine?

I have a bunch of WWII Aerial images that I georeferenced in ArcMap and when I load them in Imagine they are being displayed as plain rasters. I tried the Import Data tool, converted the georeferenced ...
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2answers
51 views

Georeferencing tiff that contains 1 line of latitude, 1 line of longitude, and scale bar?

I have a tiff that I pulled from a PDF file. It consists of a scale bar, an NTS mapsheet number, a north arrow, a scale bar, a scale, 1 line of latitude, and 1 line of longitude. I want to ...
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0answers
356 views

How to make a .pgw file for a .png depicting a 2D profile

My question is more of an inquiry about whether I am trying to do is possible. I would like to reference an image depicting a 2D Georadar profile. I know that world files are usually used for ...
2
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1answer
264 views

Opening .tab files associated with .lbl files in ENVI

I need to open .tab files containing location information of chandrayaan-1 HYSI dataset. It contains four ASCII columns: longitude, latitude, pixel and scanline data. I need to open the .tab file as ...
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2answers
236 views

Georeferencing map with known Central Lat-long and distances?

I have the scanned copy of an Old Map which was created using a Plane Table survey, and based on my reading of literature around it, is supposed to be quite Accurate. The central Lat-long is known, ...
5
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0answers
351 views

QGIS Referencer: Tranformed Failed

I'm using a new install of QGIS 2.18.2 on an iMac running OSX 10.10.5. I create a new project. I use the OpenLayers plugin to show an OSM background of a part of Mayfair in London. I now use the ...
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2answers
805 views

Using World Files to Reference Raster Datasets in ArcMap

I am trying to georeference a simple raster image using a world file I was supplied with, however I am struggling to associate the world file with the image. I have read up on it, it seems that in the ...
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0answers
85 views

Projection details of “Carte géologique de la France”

I am trying to georeference two sheets of the Carte géologique de la France 1/50000 by J. Thierry from 1974/75. It says "Ellipsoid de Clarke" on the map. Unfortunately this is the only information ...
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1answer
365 views

Geocoding/Georeferencing with CARTO BUILDER possible?

Is there any way to do Geocoding with CARTO BUILDER? 1st file: markets.csv with my markets and the coordinates in separate x and y columns; I can upload the .csv but of course I do not have a useful ...
2
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2answers
210 views

Determine map projection

I need to convert a JPEG into a Geo-referenced TIF and generate tiles from it for overlaying them on Google Maps. The JPEG is available at ftp://ftp.bom.gov.au/anon/gen/radar_transparencies/IDE00035....
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1answer
80 views

Creating bubble graphs in Carto using UK local authorities and Regions as the “Admin Region”

The data I have is a list of projects for which I have the following geographic information: postcode longitude and latitude local authority region (or country, eg Wales) as well as other details ...
2
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1answer
74 views

QGIS Vector-/ Raster Import of multiple non-spatially registered datasets

When you import multiple spatially unregistered datasets and you want to set the same coordinate system to all data you have to set it for every dataset separately in the import dialogue. Is there a ...