[Mobilitydb-dev] Fwd: MobilityDB and the MEOS library

[Vicky Vergara]

---------- Forwarded message ---------
From: Esteban Zimanyi



Dear Krishna

I hope you are doing well.

I wanted to inform you about our current ongoing work on MobilityDB towards
creating a C library MEOS.

Our users are continuously asking for streaming support for MobilityDB. In
this context users work independently of a database on main memory
collecting GPS observations from, e.g., a Kafka stream, cleaning this
data, visualizing it using, e.g., Open Layers
https://github.com/MobilityDB/MobilityDB-OpenLayers
and when more recent data is available, save the previous data into
MobilityDB and continue working with the latest observations.

I know very well that this is the use case for which you created the MEOS
and pyMEOS projects
https://github.com/adonmo/meos
https://pypi.org/project/pymeos/
Alas, we do not have the resources to continue in parallel the development
of MobilityDB in C and MEOS in C++

For this reason I have been working the last 6 months (even before the
official MobilityDB 1.0 release in April 2022) for enabling the SAME code
base to be used for building both MobilityDB and MEOS. That was a
challenging task from an architectural perspective but soon we will have a
first version of the MEOS library to begin testing it. However, please be
aware that this is still work in progress!

You will find in the following link
 libMEOS.zip
<https://drive.google.com/file/d/1vkeMa3PFvX4zcLwDnNe1c-kJqSnZyqbm/view?usp=drive_web>
the doxygen documentation of the library. Please unzip the file and open
the file modules.html which is the main file for the documentation

[image: image.png]
[image: image.png]
[image: image.png]
[image: image.png]

As you can see from the screen shots above, the links of each MEOS function
and the corresponding SQL function or operator is explicitly mentioned.
This documentation can be obtained from the develop version of MobilityDB
with the commands (issued in the build directory)

~/src/MobilityDB/build$ rm -rf *
~/src/MobilityDB/build$ cmake -DMEOS=on -DDOC_DEV=on ..
~/src/MobilityDB/build$ make -j
~/src/MobilityDB/build$ make doc_dev

I wanted to discuss with you how we can join our efforts in this respect to
make the MEOS library a reality, in particular, how your previous work on
MEOS and pyMEOS could be integrated with the current MobilityDB/MEOS code
base. Please let me know your viewpoint on this.

FYI we have bought the domains libmeos.org and libmeos.com to follow a
similar path as https://libgeos.org/

Regards

Esteban

------------------------------------------------------------
Prof. Esteban Zimanyi
Department of Computer & Decision Engineering  (CoDE) CP 165/15
Universite Libre de Bruxelles
Avenue F. D. Roosevelt 50
B-1050 Brussels, Belgium
fax: + 32.2.650.47.13
tel: + 32.2.650.31.85
e-mail: esteban.zimanyi at ulb.be
Internet: http://cs.ulb.ac.be/members/esteban/
------------------------------------------------------------


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Vicky Vergara
Operations Research

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