land cover - [geography] The classification of land according to the vegetation or material that covers most of its surface; for example, pine forest, grassland, ice, water, or sand. [Category=Geospatial ] ...
The materials covering a land surface, such as vegetation, exposed soils, and so forth.
Land cover, land use, and vegetation mapping data are essential elements in a wide array of government and private sector activities, including inventory, management, monitoring, and modeling.
Land cover - Anything that exists on, and is visible from above, the earth's surface. Examples include vegetation, exposed or barren land, water, snow, and ice.
Land Cover: The materials that cover a study site, such as vegetation, bare soil, rock, sand, and water.
Legend: The part of the drawn map explaining the meaning of the symbols used to code the depicted geographical elements.
Landlocked developing countries
Linear Reference System
List of environment topics
List of non-fictional lost worlds ...
~ classification from remotely sensed imagery that requires minimal operator input is referred to as unsupervised classification.
~ classification from remotely sensed imagery that requires significant operator input is referred to as supervised classification.
Global ~ Facility
The best source of free satellite imagery on the web, and one of the best websites anywhere specializing in near global Landsat TM, Landsat ETM, MODIS and other coverage.
Global ~ Facility
Global Land Data Assimilation System (NASA) ...
area of ~ed by shallow water or saturated by water.
Encyclopedic Entry: wetland
ZIP code ...
Fig. 4. -- ~ as represented in a simple raster system. Cells with a "1" are forests, cells with a "2" are croplands, and cells with a "3" are rangelands.
An example would be ~ classification. [LINK] Raster data files can be manipulated quickly by the computer, but they are often less detailed an may be less visually appealing than vector data files, which can approximate the appearance of more traditional hand-drafted maps.
155 Geographic Information Retrieval and Analysis System, a project conducted by US Geological Survey in the 1970s; produced vector interpretations of land use/~ stored in an early topological data structure. GPS p.
The clusters or spectral classes result can be related to ~ types on the ground.
For example, reasoning that a ~ type classified as Deciduous Needleleaf Trees in one dataset is a specialization of ~ type Forest in another more roughly-classified dataset can help a GIS automatically merge the two datasets under the more general ~ classification.
Create an Image Map to Represent your Proposed ~
Othophotos are great, but they seldom represent the landscape with our proposed interventions. Where do we get an aerial image that represents what is in our imagination?
University of Maryland Global ~ Facility for free viewing/download of individual Landsat images, GeoCover mosaics, and other earth imagery data ...
GIRAS files contain land use/~ information for areas in the United States, including attributes for land use, ~, political units, hydrologic units, census and county subdivisions, federal landownership and state landownership.
Data sets include ~ for three different time periods, parcels, land ownership and management status, species distributions, wetlands, and many many others.
The same basic technique could be used, for example, to characterize land use or ~ types.
General-purpose maps show the location of roads, rivers, institutions, and ~s. Thematic maps depict particular economic, social, demographic, political, or environmental themes like population density, age distribution, political party preference, income, or malaria.
Grids that classify land use or ~ exemplify this category. Other examples are proximity grids (values identify the nearest object) and feature grids ...
Raster Data Themes: Greyscale shaded relief, cross blended hypsometric tints, satellite-derived ~ data, idealized world environment, ocean bottom, and bathymetry. Optional baked in content includes: ~, shaded relief, ocean water, and drainages with lakes.
land-use, ~, population density, etc.). These maps have the property that each point on the map belongs to one of its polygons representing its features.
The peaks poke-up and the valleys dip down with a realistic ~ wrapper. This three-dimensional rendering of geography is a far cry from the traditional flat map with pastel colors imparting an abstract impression of the area.
A vector base map for use in XMap that displays roads and streets; back-country trails; ~ shading; cities, towns and locales; and geographic features.
there may be many layers in a database, e.g. soil type, elevation, land use, ~
vector model uses discrete line segments or points to identify locations ...
The Global Ecological Land Units map provides data on landform, climate, rock, and ~ for the entire globe.
Aid from Above ...
For example, a city may have unincorporated areas within its limits, or school districts may have holes or discontinuities. Islands might be useful for mapping ~s or habitats, ...
Environmental data overlay that defines the surface of the earth in terms of vegetation type in non developed areas (i.e., forest, rowcrops, orchards, grasslands) and land use type in developed areas (residential, transportation, vacant, light industrial). ~ map overlays can be derived from ...
A description of the spatial relationship between geographic area features. Polygon topologies contain geometric links, nodes, and centroids. Examples of polygon topologies are land use and ~ maps, political boundaries, parcels, and soil types.
primary key ...
Coverage - (1) A digital map that forms the basic unit of vector data storage in Arc/Info. A coverage stores map data in the three basic forms of graphic elements, i.e. points, lines, polygons. (2) A single theme or layer of data (e.g. soils, ~, roads, built-up areas) in a geographic ...
discrete datasets such as land use/~ or habitat suitability) and is less useful where neighboring pixel values vary widely (e.g., continuous datasets such as elevation or sea-surface temperatures).
See also: What is the meaning of Cover, Information, GIS, Model, Geographic?