Yes. You did. And it failed. Miserably. Horribly so it failed.
Rest assured I tried EVERY SINGLE THING that good people suggested that
made sense, from Adobe Acrobat to QGIS.
The reason that tutorial you had suggested failed utterly miserably was
because of a few hurdles which have been surmounted since then... so I
should give it another chance.
But rest assured I tried it, but remember I had an immense problem
installing QGIS (which is so badly written that it doesn't even tell you
WHY it won't install when I told it to install onto the D drive).
I don't blame you because of their badly written installer - but it was a
hurdle that I had to overcome without any reason whatsoever given by the
badly written QGIS installer.
Then I ran into the badly written portable GIS installer, which was almost
as badly written as the QGIS installer in that it didn't say WHY it failed
but luckily it failed due to a set of missing DLLs which when reverse
traced, I guessed that they were needed for C++ but remember that was a
I had no idea if my guess was correct.
I had no idea which version of C++ it needed even if my guess was correct.
Luckily, it turned out that the C++ I installed worked but that wasn't the
end of the badly written tutorials in that the georeference menu DOES NOT
SHOW UP until you enable a plugin (the Georeference GDAL plugin).
The tutorial you pointed me to did NOT say that (as I recall), so it's a
badly written tutorial for a beginner. When I got to that point of the menu
not even existing, I gave up on the tutorial that you had referenced.
But please don't blame me for badly written tutorials & installers.
Most others would have given up long ago I suspect but I kept trying as I
know you are a respected posted (I looked at your posts in other threads,
some on the newsreader newsgroup where you're highly respected).
Now that I have surmounted most of those hurdles, none of which are covered
in the tutorials, I should be able to return to that tutorial as long as
the menus aren't too different from the version I have installed (QGIS
I've been testing out EVERY suggestion, but as you noted, there's a steep
learning curve which hits the beginner in the badly written installers and
badly written tutorials that don't tell the beginner they have to load a
plugin in order to get the menu to show up and even then, the menu shows up
much later by magic (I still don't know what made it turn on).
But I do have the georeference menu now and I've used it and it seems to
work so I'd say I'm one half the way there to success.
A lot of the problem is I don't know what they want me to do, since all I
really want is a map of an apartment complex that I can route inside of
OSMand or inside of the Avenza or Paper Maps Android & iOS apps.
> Having said this, your image needs most likely georeferencing methods
> from the advanced portfolio. But without the basics you'll probably
> get lost in the advanced tutorial.
What is disturbing about all the tutorials so far is they skip important
steps (e.g., they skip that you have to load a plugin before the menus show
> It is important to emphasize, that ground control points should be
> clearly positionable. If you are unsure, whether a coordinate of your
> image /really/ is identical to a point of an already georeferenced
> map layer, choose another one.
This may be the problem since I went through the mechanics to assign five
or six GCPs from the OSM map and my apartment complex map. I chose the
center of the pool and the corner of a building and the intersection of two
cross walks, etc.
I guess what you're saying, and if I guess wrong please correct me, I guess
you're saying some points are less reliable than others. So a reliable
point, for example, might be the center of an intersection more so than the
center of a pool. Is that what you're trying to warn me about?
> And try to wide-spread the ground
> control points on the whole image. A couple of points with short
> distances between each other will provide good coordinates just for
> the included area. Everything outside will most likely deviate.
I did try to pick a GCP on each corner of the apartment complex map and in
the middle where the pool was, but what I can easily do is add a dozen GCPs
since they're easily enough created.
My problem is what do I do AFTER I create the GCPs and run the georeference
command on the suggested transformation and datum?
What format do I save map in that OSMAnd and/or Avenza will read and allow
me to navigate on? And how do I save the apartment numbers on the map so
that I can route to them on foot?
> If the source image is not distorted, choose a simple transformation
> algorithm (like linear), if possible. Higher level algorithms try to
> correct distortion and are most likely to insert a distortion not
> present in the original image.
I did choose linear. I don't know enough to change it anyway so I'll use
whatever the transformation the tutorial suggests.
>> I am stuck at what I save and what I load into an Android map program.
> You mentioned OSMAnd. This program will load points (for example a
> point shape digitized on your georeferenced image) converted to Points
> of Interest (POI). These can be selected as navigation target and can
> carry a remarks field for additional information.
THANK YOU FOR THAT HINT. In the end I have to hand this map to other people
who will be using OSMAnd or Avenza to navigate around the apartment
If I can find a tutorial that does exactly that, I will be golden!
Hmmm... If there's another way, I need to explore it as I _tried_ to create
a LOCAL (custom) map in OSMAnd and failed.
If I could just create a local map that isn't on the Internet, I'd be fine
since OSMAnd has the apartment buildings & pool (Google Maps does not).
> Another way would be to create a map project with QGIS for use with
> QField on a smartphone. Search for QField in the app store of your
> smartphone or get binary packages from here:
I'm on Android but the others can be on iOS too.
I never heard of QField before so I thank you for that suggestion.
I installed it and it asked me to open a local file so I'll need to take
some time to figure out how it can help me route on foot in an apartment
> You can add map background data (OSM, aerials, topo maps, georeferenced
> images, shapefiles,...) and digitize the points directly in the field
> by adding points either manually or per GPS. Later on, you can re-import
> the point shape to QGIS and export them to POI's for OSMAnd and the like.
I'm not sure if I understand any of that yet but what I will do is continue
to try to find a tutorial that doesn't skip critical steps in walking a
noob through the steps of geofereferencing a apartment complex map (which I
think I have done but it's in a QGIS format currently called QGS and QGZ).
What I want is to use that output inside of OSMAnd or Avenza or Paper Maps
to route, on foot, from one apartment to another in the apartment complex.