MGCP LandCover features

The MGCP model contains very precise specifications for feature extraction. The LandCover area feature classes are used as the base for all land areas, and only certain feature classes can be extracted as features on top of it. The feature class subtypes that can be used to represent other feature types either on or adjacent to land do not always represent all the subtypes available in a feature class.

The model contains very specific guidelines for the units of measurement that must be used when working with an extent. For example, each area is a cell one degree by one degree in size, and the LandCover area feature must cover the entire area without any gaps.

The LandCover extension allows you to add areas that penetrate the LandCover, validate the cell, and correct any errors found. It is composed of the following three tools:

Cell validation

When the LandCover area within a cell is validated, a feature class is created so gaps in the LandCover can be represented in the map. The gaps are captured as line features and can include holes within a ground feature that is inside the cell.

注意注意:

The validation tool can only be used with a single cell.

Since the MGCP specification does not allow gaps within the LandCover area, these gaps must be filled using a feature class that is permissible to use as LandCover area.

LandCover area subtypes

The feature class subtypes that can be used as LandCover area features are as follows:

Feature class

Subtype(s)

BuiltupA

Built-Up Area

CoastA

Tidal Water

CropA

Rice Field

CropA

Crop Land

ExtractA

  • Extraction Mine
  • Quarry

FirebrkA

Cleared Way

GrassA

  • Grassland
  • Thicket

GroundA

Soil Surface Region

LakeresA

  • Lake
  • Reservoir

Landfrm1A

  • Sabkha
  • Sand Dunes

Landfrm2A

Moraine

LandIceA

  • Glacier
  • Snow Field and/or Ice Field

OasisA

Oasis

SwampA

  • Bog
  • Marsh
  • Swamp

TreesA

Wood

TundraA

Tundra

VoidA

Void Collection

WatrcrsA

  • Canal
  • Ditch
  • River
LandCover feature class subtypes

9/23/2010