I would like to analyze data included in a pdf file. The file contains information on characteristics of 16km grid cells for a specific study area. The file also includes a map displaying the grid. I know the coordinate system and datum that has been used to create this map.
I would like to create the exact same grid in QGIS as to merge the data from the pdf file with further geographical information on the study area. I am a total QGIS noob and I don't know if what I want to do is possible at all.
What I have done so far is: I copied, digitized and and georeferenced the map contained in the pdf. I then set the CRS according to the information I got from the pdf. I then tried to "reproduce" the grid with 16km cells using the QGIS vector grid tool.
Now, here's my problem: the side length I enter into the vector grid tool is in degrees not km. I have measured the length of the grids in degrees (using the QGis distance measurement tool). If I try to create the vector grid using the degree measure for the side length I get cells that are approx. the size of the original map at some parts of the map but not at others. Finally, even if I got a grid of the same size as the original, I am not quite sure how to adjust the location of the grid I created to the exact same location as the original one.
I hope that I have been able to explain my problem in an understandable way! I am somewhat lost and would be very grateful for any advise! Many thanks and best regards