Tag Info

New answers tagged

4

reaname world file to .pgw from .pnwx. keep both image and world in same directory with same name.


0

I'll try and answer your first question. If you have academic access to OS historical mapping I think the sheets you downloaded will already be georeferenced. That is, for each TIFF file there will be a TFW file that contains geoferencing data. The TIFFs and the TFWs must be kept together in the same directory. Assuming the sheets are georeferenced, the ...


2

Before you can merge the maps together, each one will need to be georeferenced. Here is a QGIS tutorial for georeferencing. Once that is complete, you want to merge the images into one bigger image. That process is called mosaic. Here is a QGIS tutorial for mosaicking. Alternatively, you can stitch images together in GIMP or Photoshop into one much larger ...


5

Turn off snapping (Snapping toolbar, uncheck "Use Snapping"). I've had this problem before when there are many vector layers in a project, the cursor is getting bogged down looking for a vertex (or edge, or whatever) to snap to. You could also try copying the image to be georeferenced to a new, empty ArcGIS project along with the bare minimum of vector ...


0

Posting this for the benefit of anybody who may come across this and may not have thought to do this: I had survey data in CSV files and assumed the data was X,Y,Z coordinates, but spent several hours trying to import and project to no avail. It wasn't until after speaking with the surveyor that I found out that the coordinates were Northing, Easting, ...



Top 50 recent answers are included