osmscout-server VS gImageReader

Pure Maps with OSM Scout Server for offline mapping and geolocation

- build a minimal web page showing a Leaflet or a MapLibre widget, connected to a backend built using a compiled language like C++ or D, itself connecting to OSM Scout Server to provide the tiles. Or to OSM Scout Server directly if it is possible.

The last option is probably the most lightweight solution, provided you probably have a browser already running on your phone. I'm not saying this out of my ass by the way, I'm building an SMS app using Svelte for the user interface and D for the backend connecting to the modem and managing the SQLite database. It's way faster than chatty.

[1] https://openrepos.net/content/rinigus/pure-maps

[2] https://rinigus.github.io/osmscout-server/

There are on device or even in browser renderers that only need remote or locally stored vector data to render the map. This moves the burde of rendering to user devices that should be more than capable for this today (especially if you use a GPU renderer) and makes you server into just a dumb data pipe that should be able to scale much better & more cheaply.

One such renderer available via Qt/QML:

https://doc.qt.io/qt-5/location-plugin-mapboxgl.html

Alternatively you can have a local daemon running that does the tile rendering on your device from offline data packs. This way even "legacy" apps requiring simple bitmap tiles will work without (major) changes. One such project providing this (among other APIs) is OSM Scout Server:

https://github.com/rinigus/osmscout-server

On tesseract base here is a software to make a scan a text searchable pdf. It take a bit of time and can be a bit tedious but it does the work! https://github.com/manisandro/gImageReader/releases It does not work well on cursive writing of course. It's a bit less heavy code sided solution. Good luck!

I'm working with old newspaper PDFs to convert them into DOC formats. I'm having a great time with gImageReader by highlighting columns and converting them to plain text. Then I take that plain text into Libreoffice Writer (7.0.4.2) to clean up and save. If this were a book as opposed to a newspaper with ads and columns, it would have bee a lot easier to convert and format.

It would help to know a bit more of your usecase. If you're looking to just extract the text (ie, take all the textual content of your PDF and drop it into a separate text document), there are solutions like ABBYY Finereader and gImageReader. If you're looking to make PDFs searchable (keeping the scanned pages, but adding a text layer underneath so you can search and copy from them), there's NAPS2 (which has an additional command line tool for automation) and OCRmyPDF.

OpenSource OCR... for desktop users I like "gImageReader" URL: https://github.com/manisandro/gImageReader (Technically is GUI for tessaract)

gImageReader is the linux standard that I'm aware of. It's a GUI to Tessaeract, but IIRC you can use other models if you have them.

gImageReader as a simple OCR application

https://github.com/manisandro/gImageReader ^^ seems like it has installers for different OS's