Geographic Information Systems (GIS) Overview

These flashcards cover key concepts and vocabulary related to Geographic Information Systems (GIS) for effective review before the exam.

Geographic Information Systems (GIS)

A system for storing, analyzing, and managing spatial data and associated attributes.

Coordinate System

A system that uses numbers to represent a point in space, typically in terms of latitude and longitude.

Shapefile

A file format used for storing the geometric location and attribute information of geographic features.

Spatial Reference

Information that describes the location and size of objects in a GIS.

Attribute Information

Additional data that describes features in a shapefile, such as names, types, or classifications.

Points in GIS

Representation of discrete locations or objects, such as trees or buildings, using coordinates.

Lines in GIS

Representation of linear features, such as roads or rivers, characterized by start and end points.

Polygons in GIS

Representation of enclosed areas, such as lakes or properties, defined by multiple coordinates.

Overlay

The process of layering multiple shapefiles to visualize different data sets simultaneously.

Query

A request for information from a database, allowing users to extract specific data from shapefiles.

Environmental GIS Uses

Applications of GIS in environmental contexts, such as mapping pollutants or protected areas.

Municipal GIS Uses

Applications of GIS in urban planning, such as mapping property values and infrastructure.

Forestry GIS Applications

Use of GIS in forestry for mapping vegetation types, tree health, and soil classifications.

Static Maps

Maps that are fixed and do not change, often created from shapefile data.

Interactive Maps

Dynamic maps that allow users to interact with the data, often displaying shapefiles.

GIS Data Acquisition

The process of collecting and inputting spatial information into a GIS.

Mapping Visualization

The display of data on a map, allowing for interpretation and analysis of spatial information.

Spatial Analysis

The examination of spatial relationships in GIS data to uncover patterns.

GNSS

Global Navigation Satellite System used for determining precise locations on Earth.

Attribute Table

A data table linked to shapefiles containing attribute information for geographic features.

Complex Queries

Queries that involve analyzing data from multiple shapefiles to answer complex questions.

ArcGIS

A commonly used GIS software for creating and analyzing spatial data.

QGIS

A free and open-source GIS software that allows for similar functionalities as ArcGIS.

Data Planning in GIS

The initial step in creating shapefiles, involving determining data requirements and attributes.

Field Notes

Recorded observations and data taken during fieldwork that are critical for data accuracy.

Merging Shapefiles

The process of combining multiple shapefiles into a single file for comprehensive analysis.

Query by Attributes

Selecting specific features of a shapefile based on their attribute values.

File Modification Challenges

The difficulties encountered when trying to change or update large shapefiles after creation.