Web development – TYC GIS – GIS, Teledetección y Drones

Project | Shadow maps to improve working conditions on the streets

TYC GIS — Fri, 19 Jan 2024 10:52:24 +0000

It is no secret that Spain is, to a large extent, a place that enjoys long summers and many hours of sunshine. This creates enormous potential for sectors such as tourism, agriculture and electricity generation, but also creates problems in day-to-day life. It happens, for example, that thousands of workers have to carry out their work in the street and sometimes have to perform tasks under a blazing sun. This is why the company Rivamadrid, Rivas Vaciamadrid municipal services company, thought of designing routes that would minimize the sun exposure of its workers, thus improving their working conditions and reducing the risks involved in long days exposed to solar radiation and high temperatures. To achieve this, they needed to have information on which areas are in the shade at each hour of the day at each time of the year.

That’s where TYCGIS comes in. Could we generate maps with the projection of shadows on the streets every hour from sunrise to sunset? Yes, we can. To do this we need to know the coordinates of the place and calculate the relative position of the sun (Azimuth and solar or elevation angle) at each hour of the day for the days we will use. In this case we will use the first day of each month and there are numerous online tools for this, such as SunEarthTools, which gives us the data we need just by entering the coordinates, the time we want to consult and the time zone to which this time belongs (we might want to know what time Spanish sunrise is in Lima). To speed up the process and above all to gain flexibility, instead of using these resources, we developed a tool that allows us to obtain a JSON file with the elevations for as many time intervals for the days we need.

Now we need surface models (MDS), first we tried to use the MDS that the National Geographic Institute (IGN) makes publicly available in its download center. Unfortunately, the MDS available are models with a mesh pitch of 2.5 meters, which did not give us a good result, especially when calculating tree shadows. To improve this, we resorted to work directly on the LIDAR data and obtain our own models, using software such as LASTools and CloudCompare, we achieved models of Surfaces with and without trees for the differentiation of the winter months in which the deciduous trees do not cast as much shadow.

As a final result, we made a composition on a base map, where we superimpose a layer with the trees and another with the projected shadows. On these maps, routes can be traced trying to minimize the sun exposure of employees in the development of their work.

September 1st 9h:

September 1st 19h:

As an additional product to the initial purpose, insolation hours maps were also obtained for each day studied. In this case, a simple sum of the hours of insolation for each day was made for each pixel analyzed, but the study could be enriched with solar azimuth and climatic data if other indexes were desired for the calculation of the estimated incident energy for each point in an entire year, in an agricultural season, etc.

In the end, in TYCGIS, we are very used to carry out projects where GIS is used to increase performance from an economic perspective and it is very rewarding when you have the opportunity to do a job that directly affects the quality of life of people and see how you can also use geographic information systems to improve the lives of people, in this case enabling improvements in occupational safety and welfare at work.

Customers:

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Project | Mapsens® Agro | System for control and optimization of pruning/clearing works for oil wells

TYC GIS — Sat, 15 Aug 2020 11:40:39 +0000

In this project TYC GIS worked on the development of a system to control and optimize the pruning/clearing of 135 oil wells in the Castilla and Chichimene fields (Colombia) with Mapsens® Agro.

The work began with the generation of detailed orthoimages of the locations and a digitalization of the vegetated and built-up areas. From this point on, these areas have been analyzed monthly with multispectral satellites. Monthly measurements have also been taken to relate vegetation height/development with the photosynthetic activity value to generate a predictive model to help plan maintenance works.

All this information is loaded into Mapsens® Agro for consultation. To improve its analysis, specific functionalities have been developed: a well finder/locator, pruning indexes (growth, clearing and stable), vegetation height estimation function, and a summary table of the general status of each well with areas worked, evolution, etc.

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Project | “LE CRET” web viewer of hydrogeological resources of Tunisia

TYC GIS — Thu, 16 May 2019 11:45:52 +0000

In this project TYC GIS worked on the development of a web viewer to visualize environmental data collected in a hydrogeological project of the Tunisian Ministry of Geology.

Areas such as geology, hydrology, precipitation, temperatures, groundwater, surveys or historical works are covered. Outside the database, rasters are stored and are also visualized by the application. The web allows opening PDF files and images associated with the records. Interactive elements were added to the map (entity query, selectable graphic scale, label creation, etc.) as well as customized query tools. The application has the ability to generate printed PDF maps from what the user is viewing, including active layers and legends.

The application has a user authentication system that protects all content. The accessible content depends on the user’s privileges over each thematic category. For those with an administrator role, a control panel has been enabled that allows users to consult, create, edit and delete users, as well as to have access to the application’s log history (who has done what operation and when).

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