[HOT] Getting the Bounding Boxes of the Validated Regions

Serkan Karakulak sk7685 at nyu.edu
Tue Nov 20 16:02:14 UTC 2018


Hi Joseph,

Thanks a lot, this was exactly what we needed indeed! Much appreciated,
thank you for your help.

Is there a reason that there are five coordinates for the tile btw, instead
of four?

Best,



On Tue, Nov 20, 2018 at 10:10 AM Joseph Reeves <iknowjoseph at gmail.com>
wrote:

> Hi Serkan,
>
> I've not looked into this properly, but a quick look at a project on the
> Task Manager shows I can find a validated square:
>
> https://tasks.hotosm.org/project/5182?task=2212#bottom
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__tasks.hotosm.org_project_5182-3Ftask-3D2212-23bottom&d=DwMFaQ&c=slrrB7dE8n7gBJbeO0g-IQ&r=9jC6quPZN0RnI866qaQhEg&m=9OlRe6xcyrgpxFqRTDdxQpAT2MxJY1U8BQHF1Eb916Y&s=NIrWuzEqTDWUx8Q-ooCep6LppJk6vUeKNdCqzT4CpM0&e=>
>
> This task 2212 appears in the project geojson, and marked as validated:
> https://tasks.hotosm.org/api/v1/project/5182/tasks?as_file=true
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__tasks.hotosm.org_api_v1_project_5182_tasks-3Fas-5Ffile-3Dtrue&d=DwMFaQ&c=slrrB7dE8n7gBJbeO0g-IQ&r=9jC6quPZN0RnI866qaQhEg&m=9OlRe6xcyrgpxFqRTDdxQpAT2MxJY1U8BQHF1Eb916Y&s=iYZA-4J-uBIDT8C04bnsXvJKvA_NZKlkdkaT88KckfI&e=>
>
> I've not double checked this is what you want, but looks like a good place
> to start:
>
> "type": "MultiPolygon"}, "properties": {"taskId": 2212, "taskSplittable":
> true, "taskStatus": "VALIDATED", "taskX": 30348, "taskY": 34875,
> "taskZoom": 16}, "type": "Feature"}, {"geometry": {"coordinates":
> [[[[-13.2934570288688, 11.4907909783363], [-13.2879638648073,
> 11.4907909783363], [-13.2879638648073, 11.4961739900467],
> [-13.2934570288688, 11.4961739900467], [-13.2934570288688,
> 11.4907909783363]]]],
>
> Cheers, Joseph
>
> On Tue, 20 Nov 2018 at 03:47, Serkan Karakulak <sk7685 at nyu.edu> wrote:
>
>> Hi,
>> I am a graduate student in a Data Science program, and I wanted to get in
>> touch with you because me and my two other friends are interested in
>> working on a machine learning project to map areas using their satellite
>> images and produce their labels. If we obtain a high accuracy, we thought
>> it could be of use to the hotosm and the missingmaps initiatives.
>>
>> I have first heard about Missing Maps when I came across a mapathlon
>> event two years ago in Istanbul. We were in search for a class project for
>> one of our courses and I remembered about the mapathlon event and we would
>> be very happy if we could contribute to the this wonderful initiative.
>> There are already some previous successful works on this subject, so we are
>> very hopeful that we could come up with an algorithm with high accuracy.
>>
>> In order to develop the model, we need to extract bounding boxes of the
>> validated tiles we see at hotosm. Then we will extract the satellite images
>> and their labels using the label-maker API which is developed by DevSeed.
>> Is there a method to extract the coordinates of these validated tiles?
>>
>> Thank you for your time and help.
>>
>> Best,
>>
>> Serkan
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>
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