This GIS study applies Geographically Weighted Regression (GWR) to investigate the spatial relationship between Purchasing Power Index (PPI) and the distribution of gambling-related retail establishments within the city of Madrid. My aim is to account for spatially varying relationships driven by local urban contexts, under the assumption that the relationship between socioeconomic conditions and the presence of gambling venues varies across urban space. My hypothesis is that the socioeconomic conditions of the urban fabric can be a breeding ground for the location of betting shops, or in other words, I am attempting to Detect Urban Vulnerability to Gambling Harm.
Tag Archives: geovisualizacion
Spatial relationship between “high schools” and “betting shops” in Madrid. A first approach (1)
It is a fact that a betting shop should not be close to a secondary school. Its obvious the impact on population ranging 12-17 could be higher than in other. How near? 100m? 500m? Euclidean distance or following the street network?. In any case, if I choose for instance a range of 500m, for example, 81% of betting shops in Madrid have secondary schools within that distance (258 out of 316). Looking at it from the secondary schools’ point of view, almost 60% of secondary schools have betting shops within 500m (171/291). This is undoubtedly an issue that needs to be addressed.
¡Al final se nos quema la península este 2025!
Este agosto, España y Portugal han vivido una temporada de incendios excepcionalmente dura. En España, las llamas han calcinado ~382.000 hectáreas (más de seis veces la media reciente) y han dejado víctimas mortales; en Portugal, las superficies quemadas superan las 200.000 hectáreas, muy por encima del promedio 2006–2024 para estas fechas. El humo cruzó fronteras y degradó la calidad del aire a cientos de kilómetros.
Agricultura de Precisión. Uso del Satélite para la toma de decisiones en el campo
Quieres conocer cuál es el momento óptimo para plantar? Para fumigar? Para recolectar?. Sabías que dos de cada tres agricultores no cosechan en la fase de madurez adecuada?. Aquí abajo te describo un método completamente automatizado mediante el uso combinado de varios índices de vegetación como NDVI, NDWI, SAVI y EVI que podemos extraer del Satétile SENTINEL-2 en la plataforma COPERNICUS de la UE para conocer exactamente y anticipar las mejores decisiones de intervención sobre tus tierras.
Sentinel-1 SAR: Un aliado indispensable para el análisis y seguimiento de inundaciones – Derna, Libia (2023)
La gestión y monitorización de fenómenos hidrológicos extremos, como inundaciones repentinas o fallos estructurales en presas, representan un desafío crítico para los especialistas en geomática, hidrología y planificación territorial. En este contexto, la tecnología radar de apertura sintética (SAR) a bordo del satélite Sentinel-1 de la Agencia Espacial Europea (ESA) ofrece una capacidad sin precedentes para capturar información precisa y fiable sobre la dinámica superficial, independientemente de las condiciones atmosféricas y lumínicas.
ELEVATION GAIN 84,448 m
On August 14th, 2014, I unknowingly took the first step of a long ascent. Nearly eleven years later, sharply 1089 runs later, I’ve reached an elevation gain of 84,448 metres — almost ten Everests. This isn’t the story of a single mountain climbed, but of a slow, deliberate series of efforts, some before dawn, raining cats and dogs, snowing, escaping from dogs, freezing like hell, others after long days, all contributing to a quiet accumulation of altitude and, more importantly, confidence.
Summer Heat Inequity in Madrid: A Playground-Based Analysis in Summer 2024
Between June 21 and September 21, 2024, I analyzed the surface temperatures of all 2,123 registered playgrounds in Madrid using Landsat 8/9 imagery (Level-2 Surface Temperature products). This investigation, an extension of my previous reflection on urban heat and environmental justice in Geovisualization.net (May 2025), highlights how thermal exposure is patterned by geography, planning legacies, and demographic vulnerability in the Spanish capital.
Urban delineation methods beyond administrative boundaries
As a geographer working with Geographic Information Systems (GIS), I am particularly interested in exploring urban delineation methods that move beyond the constraints of administrative boundaries. Instead of relying on official municipal limits—which can often be outdated or misaligned with functional realities on the ground—I focus on delineating urban areas based on physical indicators such as built-up surface, population density, and spatial continuity. This approach allows for a more accurate and dynamic understanding of urban space.
Urban Heat Islands, Trees, and Climate Justice in the Anthropocene: A Remote Sensing-Based Reflection
In recent years, the need to understand the urban environment has grown more urgent than ever. Climate change is not an abstract future scenario; it is already here, reshaping our cities day by day. Among the many phenomena that demand our attention, the Urban Heat Island (UHI) effect stands out—not only for its environmental and public health impacts but also for its socio-political implications. Through satellite imagery and remote sensing, we can now visualize and quantify these dynamics with increasing precision. This post reflects on such an analysis I conducted using LANDSAT 8 imagery (Scene ID: LC08_L2SP_201032_20250328_20250401_02_T1, Date Acquired: 2025/03/28), and discusses the findings in the broader context of urban planning, climate justice, and the urgent need to protect urban vegetation.
LOS ANGELES WILDFIRES 2025: Sentinel 2 +Overpass Turbo (OSM)
En Los Ángeles, la combinación de condiciones meteorológicas, como los vientos secos de Santa Ana y las altas temperaturas, crea un entorno propenso a incendios forestales. Estos fuegos, a menudo cercanos a áreas urbanas, representan un gran desafío para la gestión de emergencias. Aquí es donde Sentinel-2 se convierte en una herramienta crucial. Utilizando la combinación de bandas 12, 8, 4, Sentinel-2 permite detectar rápidamente focos de calor y evaluar la extensión de las áreas quemadas, lo que es vital para coordinar respuestas eficaces. Esta capacidad de monitoreo casi en tiempo real es fundamental para mitigar el impacto de los incendios y proteger tanto a las comunidades como a los ecosistemas.
Geovisualization.net 