Educating about Dry Stone Heritage in the Eastern Adriatic through Interactive Maps

One of the non-profit organizations we had the pleasure of working with is “4 GRADA DRAGODID”,, also one of the winners of our GIS Day Contest 2016.

As we are approaching another GIS Day Contest, which will occur during Geo Awareness Week in November 2017 (from 9.11 to 20.11), this is a perfect occasion to present their winning project, which resulted in, an interactive portal showing locations of the dry stone heritage throughout Croatia.

Mapping cultural heritage in Croatia


We spoke with Grga Frangeš from 4 GRADA DRAGODID, who explained the organization’s activities, their project, as well as their goals and plans for the future.


The organization and main projects

4 GRADA DRAGODID is an organization dedicated to the preservation and restoration of the dry stone walls in Croatia and the Eastern Adriatic, as well as educating and informing the public about dry stone heritage, its history, function, and importance.

dry stone wall 4 GRADA DRAGODID

“An example of the dry stone wall. Dry stone is a stone wall that is made without mortar to hold the stones together (Merriam-Webster)”


The organization was established in 2007, but their first activities date back to 2002, when the first international dry stone workshop was held in Dragodid, a village in the vicinity of Komiža, the island of Vis (Croatia). Today, they are present in various localities throughout the Croatian coast and in nearby countries. 4 GRADA DRAGODID has 40 members, and their main activities consist of organizing dry stone workshops in different locations, and research into the dry stone heritage in collaboration with local partners who have knowledge about local traditions and the artisans of the dry stone construction.


The importance of drystones for preserving cultural heritage

Although at first glance dry stone wall construction may appear to be an uninteresting, even ‘primitive’ type of structure, its importance needs to be assessed from a wider perspective. In a literal, visual sense, the ‘wider perspective’ is available to us through aerial and satellite imagery visualized using web mapping technologies. When we take a look at the dry stone construction, we will see that they are widespread in the karst areas, where stone is the principal material in the landscape.

In areas populated with human settlements, the stone is also considered ‘an excess’, that has to be removed or put to a particular use in order to survive in an often inhospitable environment. Knowing this, from a cultural or less literal perspective, the dry stone heritage represents a kind of the “infrastructure of survival” through which people have tailored and modified the merciless environment to their life needs.

Photo Credits: 4 GRADA DRAGODID


The project

Having in mind the scale of the dry stone heritage and its importance for the local culture, the main goal of the project was to use GIS framework to map various dry stone localities in order to preserve the heritage and raise awareness of its importance.

The idea was conceived and the domain was registered by ethnologist Jadran Kale, architect Filip Šrajer from 4 GRADA DRAGODID operationalized it into a project assignment and contacted Dražen Odobašić who developed the system’s architecture.  The project was named “ The open public inventory of Croatian drystone walls.”

The first stage of the project was launched in 2013, when the initial PostGIS database was built on a Linux VPS server, visualized and published using a custom web GIS interface built on OpenLayers technology. After that, they introduced the field data collection component, which enabled them to gather the dry stone data using smartphones directly in the field.

During 4 years of continuous work, more than 3200 entries that included GPS locations, dry stone photos, and descriptions were collected by the members of the 4 GRADA DRAGODID organization.

Their next goal was to build a community of people who would be motivated to contribute to the project with a system that would encourage social interaction within the community by rewarding the most active members and those with the best data collection contributions.



An example of the data collection form used for the project



The initial advantage of the project, its customizability gained by web development efforts of the volunteers, proved to also be a disadvantage in the long term.

Namely, as the whole project was based on the volunteer work, the first problems arose when the developers didn’t have enough time to spare to continue the maintenance, upgrades, and administration of the project. Because the web solution they had was unique and custom, and it didn’t have sufficient documentation and details necessary for the knowledge transfer that would allow other volunteers to take over, the project came to a halt. What they needed to continue the project was a simpler solution that wouldn’t require additional web development skills from the volunteers, and that would be easy to handle when it comes to updating, customizing, and maintaining the system.

For some time, there was no sign that the volunteers would be able to continue the project. However, the project came to a turning point when the team from 4 GRADA DRAGODID was presented with an opportunity to revitalize their project after they learned about the GIS Day Contest in 2016. The GIS Day Contest was conceived as a platform to support the realization of mapping projects that contribute to a local community by providing the necessary tools and technical support for their realization. They decided to enter the contest, and were subsequently selected as one of the contest’s special award winners in the category of non-profit organizations.

This meant that they finally had the means to revive the project, this time on top of the GIS Cloud platform, and with the help of the GIS Cloud team.  



The solution provided by GIS Cloud proved to be the perfect way to continue the project and overcome the challenge of maintaining the project with easy-to-use tools which don’t require web development skills from the volunteers working on the project.

First, the biggest technical effort was put forth in consolidation and adjustment of the original PostGIS database data structure. The original PostGIS database needed to be adjusted to several requirements before the connection could be established, like ensuring that the user and PostGIS tables have the relevant database permissions necessary to read them, modifying the column names connected to feature geometry and primary keys (ID), etc. After the initial phase was finished, the further steps were rather simple and the implementation of the new solution went smoothly.

One of the most important GIS Cloud features for the project was establishing a link with the external PostGIS server using a secure SSL connection. Maintaining the database on their own servers meant that 4 GRADA DRAGODID could retain full control of the access to and use of their data. Besides the importance of establishing a link between external PostGIS database and GIS Cloud, one of the major advantages was the option to manage the external PostGIS database directly in GIS Cloud. It offers the ability to import and/or delete shapefiles or CSV/XLS files in your external database, to modify and edit the features and attribute data from tables. As an addition, the external PostGIS database can be connected to the Mobile Data Collection app so the collected field data can be stored directly in the external PostGIS database.

The map of dry stones was easily modified and stylized in the Map Editor, which also had options to add custom symbology for different attributes on a map.

For data collection, the Mobile Data Collection application was used. It proved to be a very intuitive tool that brought the fieldwork to the next level as the custom data collection forms can be set up really fast and with useful features such as offline data collection.

The new portal was published using GIS Cloud Map Portal, enabling simple customization through App Builder, in which a fully custom interface can be built without having to write a single line of code. You can see the end result of the project in the map below (direct link to the portal).


4 GRADA DRAGODID map portal interactive map portal


The future plans

Currently, the 4 GRADA DRAGODID team is striving to improve the quality of the data they have already collected, while collecting new data for which they now have new standards of quality and structure.

They plan to extend their project using GIS Cloud Crowdsourcing solution that would allow for anybody interested in the dry stone heritage to contribute to the data collection process, regardless of their expertise and technical ability. As with the Mobile Data Collection application, the data quality can be easily controlled by setting up predefined fields required or optional fields in the custom form.

The dry stone craftsmanship has recently been protected as a part of intangible Croatian cultural heritage, and it is expected to be put by UNESCO on a list of the intangible cultural heritage of mankind. As 4 GRADA DRAGODID is intensively involved in this process of protecting the dry stone heritage, their next goal is to publish a new dataset on the Portal, with data about bearers of this cultural heritage and the active dry stone masters/builders/craftsmen available for engagement in different projects with their contact information. With this, the organization wants to contribute to the professionalization of this craft, which is also one of the preconditions of its survival into the future.




Stay tuned for more information about the project and GIS Day Contest. To learn more about and 4 GRADA DRAGODID, visit their homepage.