What is GIS?
- Hanna Wellenberg
- Jan 27
- 3 min read
GIS stands for Geographic Information Systems. In simple terms, it refers to the field and technology that helps you understand what is happening and where. GIS connects data to maps, making it possible to analyse locations, patterns, and relationships in a visual and practical way.
Instead of looking at spreadsheets or reports in isolation, GIS technologies place information on a map. This makes complex data easier to understand, compare, and act on.
At MEJOR Technologies, GIS is a core technological foundation that underpins how we turn spatial data into clear, operational insight.
GIS in wildfire prevention and emergency response
Wildfires are strongly influenced by geography. Terrain, vegetation, weather, and human activity all play a role. GIS makes it possible to bring these factors together in one operational view.
In practice, GIS can support:
Risk assessment by identifying areas more likely to burn
Preparedness through fuel mapping and prevention planning
Real-time response with live incident data and situational awareness
Post-incident analysis to learn and improve future actions
This is why GIS technologies are central to solutions like MEJOR’s LUCI for wildfire risk intelligence and CHRIS for real-time incident mapping.
How does GIS work?
GIS brings multiple data sources together through integrated GIS systems, creating a single, location-based view of complex information. The real power of GIS lies in how these different layers interact, revealing patterns and risks that are not visible when data is viewed in isolation.
At MEJOR Technologies, we combine a range of spatial datasets to build a comprehensive picture of wildfire risk and incident dynamics. Key layers include:
Weather Data
Weather is one of the most influential factors in wildfire behaviour. GIS allows us to integrate temperature, wind speed and direction, humidity, and precipitation data. This helps assess ignition risk, predict fire spread, and understand how conditions are evolving over time.
Vegetation indices
Vegetation indices provide insight into fuel availability and dryness. By analysing satellite-derived indices, GIS helps identify stressed or highly flammable vegetation and track seasonal changes that influence fire risk.
Topography
Slope, elevation, and aspect have a direct impact on how fires move across the landscape. GIS uses topographic data to model how terrain can accelerate or slow fire spread, supporting more accurate risk assessments and response planning.
SAR
Synthetic Aperture Radar, often referred to as SAR, offers reliable information regardless of cloud cover or daylight conditions. Within a GIS, SAR data supports surface analysis and change detection, which is particularly valuable during active incidents or in areas with limited visibility.
Human Activity
Human presence plays a major role in wildfire ignition and exposure. GIS layers such as roads, settlements, population density, and infrastructure help identify areas with higher ignition probability and assess which assets or communities may be at risk.
Land Use
Different land use types influence how fires behave and how it can be managed. Forests, agricultural land, urban areas and industrial zones each present unique challenges. GIS enables these distinctions to be clearly mapped and analysed together.
Historic Burn Data
Past fires provide valuable insight into future risk. By incorporating historic burn perimeters and fire frequency into a GIS, patterns can be identified that support prevention planning, mitigation strategies, and long-term resilience.
By layering data, GIS allows you to ask practical questions like:
Where is risk highest?
What assets are exposed?
How is a situation changing over time?
Why is GIS important?
GIS helps organisations move from raw data to informed decisions. It is widely used because it adds context and clarity.
Some key benefits include:
Better decision-making based on location
Faster understanding of complex situations
Improved planning and coordination
Clear communication between teams and stakeholders
In high-risk environments, such as wildfire response, this context can make a critical difference.
Explore how MEJOR applies GIS in real-world wildfire scenarios
Learn how LUCI supports prevention planning and how CHRIS delivers real-time situational awareness during active incidents.
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