River Map

[SneakyAdder]

Ok.....shoot me down if this has already been covered.

Is there anyway of producing a River Map (Scottish River) via GIMP?

Thanks in advance.

[rich2005]

You will have to give more details about what you class as a River Map.
An outline perhaps, or something more complicated.

A starting point might be a screen shot of google maps example: https://i.imgur.com/qgxaQ8p.jpg
Then a bit of selection and filling on separate layers. https://i.imgur.com/s4VtvYk.jpg

then up to you how it is embellished.

[SneakyAdder]

(10-28-2017, 10:02 AM)rich2005 Wrote: You will have to give more details about what you class as a River Map.
An outline perhaps, or something more complicated.

A starting point might be a screen shot of google maps example:  https://i.imgur.com/qgxaQ8p.jpg
Then a bit of selection and filling on separate layers. https://i.imgur.com/s4VtvYk.jpg

then up to you how it is embellished.

Hi rich2005.

I have attached an example of what I’m trying to achieve.
Could be quite a task I think.
What would your opinion be?
Thanks in advance.

[Blighty]

(10-28-2017, 11:28 AM)SneakyAdder Wrote: I have attached an example of what I’m trying to achieve.

I looked at Google Maps and came up with map below. Would that be suitable as a starting point?

[SneakyAdder]

(10-28-2017, 12:27 PM)Blighty Wrote:

(10-28-2017, 11:28 AM)SneakyAdder Wrote: I have attached an example of what I’m trying to achieve.

I looked at Google Maps and came up with map below. Would that be suitable as a starting point?

Hi Blighty.

Yes, that looks like a great starting point.

If the river is, say 12 miles long - would I have to take multiple screenshots on Google Maps and then stich them together?

Thanks.

[Blighty]

(10-28-2017, 12:44 PM)SneakyAdder Wrote: If the river is, say 12 miles long - would I have to take multiple screenshots on Google Maps and then stich them together?

Depends on your needs.

Zoom in/out until you get all 12 miles. If that is acceptable there is no need to stitch.

If you need more detail then zoom in and get multiple images. Then stitch them together.

[Zero01]

You could do that or use OS Maps as an alternative, with their Aerial images you could perhaps copy that into GIMP, rotate 90 degrees anti-clockwise so you get a section you want to work on. (i.e. similar to your image^)
Then transform/manipulate using GIMP.
Like this, for instance.. 

   

You could do that with sections of the river and then 'stitch' them together as you say, depends how you want it presented and the size/resolution etc.
I notice you are turning a north-south river (Halladale(?)) on it's side, guessing it's easier to view sections from left to right rather than up and down.
Anyway, just a thought.

[rich2005]

(10-28-2017, 12:44 PM)SneakyAdder Wrote:

(10-28-2017, 12:27 PM)Blighty Wrote:

(10-28-2017, 11:28 AM)SneakyAdder Wrote: I have attached an example of what I’m trying to achieve.

I looked at Google Maps and came up with map below. Would that be suitable as a starting point?

Hi Blighty.

Yes, that looks like a great starting point.

If the river is, say 12 miles long - would I have to take multiple screenshots on Google Maps and then stich them together?

You have to strike a balance between very simple (google) and maybe too complicated (OS maps)

This is an OS one: https://i.imgur.com/4OiQALd.jpg

Stitching an image together from screenshots. The tool for serious stitching panoramas is Hugin, however simple maps can be done in Gimp using a script pandora http://www.shallowsky.com/software/pandora/ If you use this, read the web page. 12 images will be a challenge.

Might go like this: 5 screenshots as an example

1. Make sure the screenshots have a suitable overlap then open in Gimp as layers. https://i.imgur.com/kOLdEIQ.jpg
2. Crop out any junk: By default, Gimp crops all layers. https://i.imgur.com/kCY03GC.jpg
3. Maybe necessary: The screenshots go top to bottom, but the script works left-to-right. If required rotate the image 90 deg https://i.imgur.com/FO7SbLg.jpg
4. Start the script: This type of image does not require overlap transparency. https://i.imgur.com/C8oMO3Y.jpg
5. Use the move tool to drag each layer across and match up the features (by eye) https://i.imgur.com/HFVO2Er.jpg
6. When complete, use the crop tool again, rotate back to correct orientation.



Save your work as a Gimp .xcf, which keeps layers masks etc. Export as a jpg or png as a single layer.

[SneakyAdder]

(10-28-2017, 01:20 PM)Zero01 Wrote: You could do that or use OS Maps as an alternative, with their Aerial images you could perhaps copy that into GIMP, rotate 90 degrees anti-clockwise so you get a section you want to work on. (i.e. similar to your image^)
Then transform/manipulate using GIMP.
Like this, for instance.. 



You could do that with sections of the river and then 'stitch' them together as you say, depends how you want it presented and the size/resolution etc.
I notice you are turning a north-south river (Halladale(?)) on it's side, guessing it's easier to view sections from left to right rather than up and down.
Anyway, just a thought.

Hi Zero01.

The image I attached was purely for example, I’m not sure which river it is.

However, I do like the look of your version, using the aerial images.
Also I would like it north-south direction instead of east-west, as per my example.

I will look into the OS Map, hopefully I can replicate what you have done.

[Zero01]

My version was derived from using the G'MIC filter 'Artistic>Poster edges' with high Smoothness to obtain that effect, however see my next post for more details and different methods/outcomes.