Layers

The Layers dropdown menu contains basic layers, including:

1. Political boundary
2. Topographic layers
3. Socio-Economic layers

Political Boundary

• Political boundary

  Polygon data representing administrative boundaries up to the third administrative level (Barangay level) for NCR. Data derived from OpenStreet Map extracts, with few topological corrections.

Topographic Layers

• Topograpic Layers

  Layers showing topographic relief over NCR.

  These include:

  • Contour – 1-meter interval contour lines depicting lines that connect points of equal elevation. Derived from 1-meter resolution LiDAR data.

    ** Note that due to the volume of contours, grids were used to conceal the lines, allowing the user to freely toggle display for each tile. To display contours, click on any tile or grid space. Click again any visible contour tiles to hide.

    ** To display contour elevation for any given contour line, hover your mouse pointer over the feature. A label for contour elevation will appear on the right, right next to the zoom controls and above any loaded legend.

  • Slope – Slope data derived from 1-meter resolution LiDAR data, measured in percent rise. Re-formatted as polygons marking extents with slopes conforming to the following ranges.

    Slope Ranges
    0-3%
    3.1-8%
    8.1-18%
    18.1-30%
    30.1-50%
    50% or higher

Socio-Economic Layers

• Layers depicting basic socio-economic information.

  • Land use – Existing land use data as depicted in the Metro Manila Earthquake Impact Reduction Study (MMEIRS), ca. 2004 (2011 updates?). Data is segregated between NCR Cities and municipality.

    Land Use Classifications Inclusion
    Commercial
    Informal Settlements
    Low-density Residential
    Medium Density Residential
    High Density Residential
    Public open spaces/ Environmentally-sensitive areas
    Hospital
    Educational facilities
    Government offices
    Military
    Industrial
    Transportation systems

  • Population – Polygon data based on the same political boundary (see III-1a, Political Boundary). Attributes were obtained from the Philippine Statistics Authority (PSA), and are reflective of the 2010 national census. Note that figures were not normalized by land area; therefore, numbers represent actual count within area and not population density.

  • Roads – Polyline data based on OpenStreet Map extract, with few attribute and topological corrections.

GeoHazards

• The GeoHazards dropdown menu contains geohazard layers from various sources designed for quick reference.

  1. Fault lines. Polylines based on regional-scale fault maps from PHIVOLCS. Data is divided into:

     • Active Faults – Traces are certain and are seen to exhibit signs of activity.
     • Trace Approximate – Evidences point to existence of faults, but trace cannot be located with absolute certainty.
     • West Valley Fault – Lines delineating faults over the West Valley Fault System running through the eastern part of NCR.

  2. Flood maps. Flood hazard maps from DOST-Project NOAH. Flood levels are shown following these ranges below.

  3. Landslides. Rain-induced landslide hazard maps from DOST-Project NOAH.

     ** Note that landslide hazard data is only available for the provinces of Bulacan and Rizal.

  4. Liquefaction. Liquefaction data from PHIVOLCS.

  5. Storm Surge. Storm surge hazard maps from DOST-Project NOAH.

     ** Note that these hazard levels follow the same configuration as flood hazard maps (see Flood maps).

     • Storm surge hazard maps are segregated into four (4) storm surge advisory (SSA) levels.

     ** Note that storm surge hazard maps are only available for Cebu, Mandaue and Metro Manila.

  6. MGB Hazard Maps. This multi-hazard layer is composed of a combination of rain-induced landslide and flood maps. This layer is only available for Metro Manila.

Ayala Assets

• The Ayala Assets dropdown menu contains layers from various CAD data.

Layer Classification Group
Residential
Commercial
Infrastructure
Uncategorized