Leaflet for animal counts

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Simbamangu

11:25

Hi - interesting solution!

til_b

Thanks

Simbamangu

I will confess to knowing nothing about JS / leaflet

til_b

I mostly wanted to learn using geotiffs from the local users computer, and apparently that works nice.

ok, no problem

If it's only small modufications i may well be able to help

what would your ideal workflow look like?

Simbamangu

If possible, that'd be great thank you

Workflow:

1. Receive images from field and dump JPG (or process raw to JPG) into folder

2. Users given a link to click that would give them a page with the clickable image and set of classes (species) to ID

3. 'Next' button to present next image, and save JSON or CSV of the data clicked at same time.

I'm trying to solve the same problem as Ragnvald (OP) - while CVAT and some other apps get close to what we need, I have a feeling that building on a super-simple application as you demonstrated would be productive

I'm looking at your Github repo for this, digging into the code a little

til_b

Okay, so you would store the images somewhere accessible from the internet. No problem, that should be doable.

Simbamangu

11:38

We're in Africa (Tanzania) with very very poor internet so would aim to store the images locally, I assume that's not an issue?

ragnvald

Although some people will have overview of such a process the workflow might be left to operators which only has acccess to smartphones.

til_b

Saving the coordinate JSON or CSV on the local PC would probably be easier, on the net somewhere would need some sort of storage backend, probably harder.

ragnvald

The operators might not be aware of the further processing of the recorded data (# of species and position)

til_b

I don't know whether leaflet will be usable on smartphones

well, it is usable, but i don't know of the usability

Simbamangu

Ragnvald - I'm thinking this would be more for an annotation lab, a replacement for the very heavy CVAT or VOTT apps, but not usable on smartphone. I suspect a specific app would be needed for that.

@til_b if the image is loaded directly, not using an OSM map as your example has, will it still be zoomable?

ragnvald

11:41

Laptop would work fine. Field operators have a lot of spare time in the evenings, so it would be great if they could do this after a day in the field.

A simplified version could be to do one picture at a time using the exif gps position as the geographic reference. Keeping it simple.

We could later be able to calculate the covered area or similar from the image metadata.

til_b

Yes, the image will still be zoomable

Simbamangu

(@til_b I'm not expecting you to produce an actual solution of course, really appreciate the advice and now playing with modifying the code)

ragnvald

We might even have some funding to do work on this from our side. As long as it is not a big venture.

(we = Norwegian Environment Agency")

til_b

I am unfortunately not in a situation to do real side work

ragnvald

11:58

@til_b Not much to do about that. Do you know someone which can do similar work given a clear requirement?

til_b

I can ask an ex-colleague of mine, but I don't know how proficient in leaflet and JS he is. I think he could manage, though. I haven't talked to him lately so don

don't know if this will work out

ragnvald

Good if you can check this out. Perhaps I and Simbamangu in any case should start writing a requirement/specifications document. How would that sound @Simbamangu ?

til_b

This leafletjs.com/examples/crs-simple/crs-simple.html is a tutorial i would recommend for the leaflet part

Simbamangu

12:22

@ragnvald I'd be keen to do that

@til_b thanks, will have a look at the examples, and see if one of our keen young coders in Tanzania has any skill with this too

ragnvald

Can you establish a shared doc for us to work on? We might also invite @til_b to add comments if he finds he is able to do this?

til_b

I would be able to comment on something

Simbamangu

Done, invite for Google Doc sent to you @ragnvald. @til_b would need a contact for sharing GDoc, not sure there's a way to privately message here on SE.com?

til_b

also, I tried some more... tilmanb.github.io/species-marker/image-local-coordinates.html . Loads from a remote URL. Width and height need to be set, but there are probably libraries to do that

contact me at the email adress i shared here: gist.github.com/tilmanb/dbfc57dd6449f998ce6fa184dc82073b

i will delete that file; GIS.SE chat is public and i don't want to post my mail address publicly for spambots to find

ragnvald

Address noted.

Example looks like something which could work - with some polishing on the user interface. Automation of image sources as well as option to send/store data.

Simbamangu

12:38

Address noted.

til_b

thanks, deleted GIST

9 hours later…

til_b

21:35

storing stuff to local disk: stackoverflow.com/questions/21479107/…

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