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If you only want to download a program, then jump directly to the downloads section and click on a file for your platform. If you are looking for instructions to use the visualization program, go to the section barnatrees.



The motivation of this program is to help answering questions such as:

This repository contains code to produce two related programs:

Both programs use the Qt framework, C++ and QML languages, and can be built (using a suitable modern compiler) for the most common targets: Windows, macOS, Linux and Android operating systems.


The current release is: Beta2 v0.0.4

GitHub All Releases License: GPL v3

Platform arch files
android all apk
linux x64 AppImage
windows x64 msi
sources all zip
sources all tar.gz


The program does not have any command line arguments. It simply outputs at the same working directory the JSON files "arbrat_viari", "arbrat_zona", "arbrat_parcs" and "barnatrees.db".



Upon startup, this program shows a map of Barcelona, centered at the default location point: Glòries square, a blue circle labeled as "Current Location", and the trees found nearby. The user can change the location by hand, with a long press and hold of the main mouse button or touch screen, or automatically using the device’s GPS (menu option "Update Position". The user can change the zoom scale either with the mouse wheel or using a "pinch" gesture in the touch screen.

Over the map, each tree is represented as a green circle. When using the maximum zoom and hovering the mouse pointer over each circle the program pops a label with the scientific name. Clicking with the mouse main button, or touching on a touch screen, the program pops a dialog with detailed information about the specimen, including a link to a Wiki page for extended information about the species, and a link to the street view of the address.

Searching functions. The user may search the trees that will be represented in the map, using the following criteria.

In addition to the map representation, the list of trees found by any of the search functions can also be seen as a list (menu option "View Results List"). Each element of the list contains a correlative number, the scientific and common names, the address and the distance to the current location. Pressing with the mouse or touching the screen on one element of the list, that element is selected and highlighted, and also labeled on the map that will be centered on the selected tree.

Configuration settings. The user may change some visualization options using the menu option: "Settings".


The first inspiration to make this program was the work of Juanjo Vidal Arbrat viari de la ciutat de Barcelona using one the datasets from Open Data BCN.


Copyright © 2019-2022 Pedro López-Cabanillas. These programs come with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under the terms of the GPLv3 license.

This application uses Qt5.

This application includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. This program is released under the GPL with the additional exemption that compiling, linking, and/or using OpenSSL is allowed.

This application contains source code from the 7-zip and p7zip projects and some classes from the Qt Installer Framework.

This application contains data provided by the Barcelona’s city council: Open Data BCN using the datasets Zone trees of the city of Barcelona, Street trees of the city of Barcelona, and Trees in the parks of the city of Barcelona under the therms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license.

Map tilesets © WikiMedia Foundation, using data © OpenStreetMap contributors.

The tree icon is a public domain artwork by Gurica, published by the Open Clip Art Library.