Key Terms 2 Flashcards
The Next 15 words
Tobler’s law
The only geography law
that things close together are more likely to be related
Raster Bands
Layers in a raster dataset, each representing a specific type of information, such as:
*Different wavelengths of satellite imagery
*Separate data layers like elevation, temperature, or land cover
Single Raster Bands
A raster dataset with only one layer, representing a single type of information, such as:
A grayscale image showing elevation
A single measure like temperature across a region
Multiple band raster
A raster dataset with several layers, each representing different types of information, such as:
*Different spectral bands in satellite imagery
*Separate data layers for various attributes like vegetation, elevation, and land cover
Digital Elevation Model (DEM)
A raster representation of terrain elevation, showing:
*The height of the Earth’s surface at each grid cell
*Used for analyzing topography, slopes, and terrain features
*3d representation
Topology
The study of spatial relationships and rules between geographic features, such as:
*How features connect or overlap
*Ensuring data integrity by defining how points, lines, and polygons relate to each other
Attributes
is whatever value is in the cell (in vector the thing on the screen connects to the screen and a row on the screen corresponds to that table
triangular irregular Network (TINS)
A vector-based model representing terrain using:
*Triangles formed by connecting irregularly spaced points
*Used to depict elevation and surface features with varying resolution
* Uses nodes
Nodes
Points in a network or spatial data model that represent:
*Key locations or intersections
*Connection points for lines or features, such as road intersections or network junctions
WFS – Web Feature Service
A web service that allows access to and manipulation of geographic features over the internet, providing:
*Vector data in formats like GML (Geography Markup Language)
*Capabilities to query, retrieve, and update spatial features from a server
*Sometimes are password protected by companies
Vectorization
The conversion of raster into vector
Rasterization
The conversion of vector to raster
Snapping
A GIS function that adjusts the position of features to align with nearby points, lines, or polygons, ensuring:
*Accurate connections and alignment
*Consistent and precise spatial relationships between features
Entity
An individual object or feature in a GIS, such as:
*A point, line, or polygon representing real-world objects like buildings, roads, or parcels
*Defined by its spatial and attribute information
*corresponds to an attribute table
Attribute
Information or details about a spatial entity in a GIS, such as:
*Characteristics like name, type, or value
*Used to describe or provide context for features (e.g., population of a city, type of land use)
