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Table 3 Conversion of factor classes or categories to weights (weights encoding) of input factors for LSM for Quito. Source: MDMQ, INEC, adapted by authors

From: Landslide Susceptibility Mapping of Urban Areas: Logistic Regression and Sensitivity Analysis applied to Quito, Ecuador

Code Weights (Partial Susceptibilities): 1 2 3 4
1geo Slope (degrees): • 0° - 10° • 10.1° - 25° • 25.1° - 35°
• > 50°
• 35.1° - 50°
2cov Lithology (categories): • Cotopaxi Lahars: steep ledges and slopes. Slopes and canyons or deep throats of ravines and rivers
• Pululahua Domes: fractured dacites from the volcano, but they appear compact and with resistant weathering
• Quito Lake Deposits
• Colluvial Mass Movements
• Colluvial Conglomerates
• Colluvials
• Casitagua Volcanics
• Undifferenced Volcanic Lahars
• Pichincha Volcanics
• Cangahua formations: compacted ashes, pyroclastic, lava
• Cangahua formations: undifferenced ashes-lapillistone with destroyed surfaces, strongly bisected in hills with rounded tips • Alluvial terraces
• Pululahua pyroclastic flows
• Guayllabamba, San Miguel and Pisque Formations: sequences of volcanic sands, pyroclastic flows, silts, lahars; at the base: fluvial-lake sequence, occasionally very crumbly
3sei Land Use / Vegetation Cover (categories): • North Andes mountain bushes
• Always-green North Andean high-mountain forests
• Mountain pasture
• High-mountain and mountain-moor grassland
• Reservoirs
• Inter-Andean dry bushes
• Inter-Andean dry forest
• Eucalyptus forests
• River vegetation from xerophytic mountain floor
• Inter-Andean mountain Saxicola Vegetation
• Airport
• Short-cycle crops
• Cropped grass
• Natural grass
• Quarries
• Buildings
• Eroded soils
4pre Soil Stability (categories): • Stabilized • Latent • Reactivated
• Colluvial
• Active
5sta Intense Precipitations in 24 h (stations types: a. maximum (mm) / n > 10 Rt = 100 years, b. Average rain (mm) / n < 10 years): • < 75.4 (a)
• < 50 (b)
• 76.4–91.88 (a)
• 51–90 (b)
• 91.88–107.34 (a)
• 91–130 (b)
• 107.34–122.79 (a)
• 137–175 (b)
6slo Seismic Intensity (European Macro-seismic Scale, ordinal): Not applicable • EMS VII • EMS VIII Not applicable
7pop Population (Inhabitants): • 0–1.81 • 1.82–5.56 • 5.57–12.47 • 12.48–31.86
8roa Road Density (m/Ha): • 0–7.50 • 7.51–18.16 • 18.17–31.99 • 32–100.70
9bui Floor Area (m2): • 0–4,180.33 • 4,180.34–35,950.76 • 35,950.77 – 104,508.01 • 104,508.02–213,196.34
10gro Building Footprint Area (m2): • 0–3,344.26 • 3,344.27–34,278.63 • 34,278.64 – 104,508.01 • 104,508.02–213,196.34
  1. NOTE: The data collected for intense precipitations was standardized by assigning partial susceptibilities (weights) to data provided by two types of meteorological stations: a. those with records of more than 10 years; and, b. those with records of less than 10 years. For the meteorology notation consider: n period in years, Rt return time. Further details on the calculation to complete the intense precipitations dataset are available in the FUNEPSA et al. report (2015)