All Questions
9 questions
3
votes
1
answer
154
views
Image Resolution degrading when georeferencing
I have a scan of a historical map in pdf. I converted it in to png as well as tif and then georeferenced it. However, as soon as I load the image (both png and tif) in to the georeferencing tool the ...
- 253
2
votes
2
answers
6k
views
Georeferenced raster image not appearing on map in QGIS
I imported a PNG file into QGIS for georeferencing, and set it to add automatically to map after finishing the process. However, once its job was done and the new layer and joined my list panel on the ...
- 141
4
votes
2
answers
165
views
Digitizing historical Brazilian map in QGIS3.4
I am trying to overlay a map of a historical boundary (in .tif format) onto a Brazilian shapefile with subnational administrative boundaries. My general question is: what is the most direct (and ...
1
vote
1
answer
315
views
QGIS georeferencer distorting colours?
I try to use the georeferencer to geofreference certain building plans, but the referencer really distorts colours:
As you can see in the picture. it hollows out what used to be solid red, black and ...
- 111
3
votes
0
answers
783
views
Georeferencing multiple images as GeoTIFF (same size and extents) in QGIS
I have 50 images and I want to georeference them all on to the exactly same place. They have all the exactly same size and extends. I've begun to load the same georeferencing points for every single ...
- 45
5
votes
1
answer
7k
views
Put png map image as a background to draw upon
I have an image of a fiber optics network map:
I want to turn this map image (without any actual GIS data) into a vector map where each point is defined by lat, long.
To do this, I'm trying to ...
- 215
0
votes
1
answer
453
views
Georeference a polyygon within a pdf file [duplicate]
I have this pdf file that contains a specific borough of my city, Montreal, with a polygon inside it. Link to pdf file: PDF FILE
The jpeg image once exported from the pdf file is the following
I am ...
- 121
0
votes
1
answer
598
views
Georeferencing image from Google Earth?
What I want to do appears 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, wrote down ...
- 9
3
votes
1
answer
4k
views
Removing 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 ...
- 173