Untitled Quiz

The science of gathering information about Earth's surface without physical contact. It involves sensing and recording energy (reflected or emitted).

The initial energy source that illuminates the target, providing electromagnetic energy.

The interaction of the energy with the atmosphere during its travel to and from the target.

The way in which the energy interacts with the object (target) depending on the properties of both.

The process of collecting and recording electromagnetic radiation by the remote sensor.

The steps involved in transforming sensor data into images (visual and/or digital) and analysis.

The level of detail that can be observed in the data in Remote Sensing like how small an area on the ground can be seen.

Different types of detail captured include spatial, spectral, and radiometric resolution.

Remote sensing techniques that rely on existing electromagnetic radiation from the sun or other natural sources.

Remote sensing techniques that emit their own energy source to illuminate the target and then measure the reflected or scattered energy.

The ability of a sensor to distinguish between narrow bands of electromagnetic radiation.

The smallest ground area that can be distinguished in an image.

The ability of a sensor to differentiate between the intensity of electromagnetic radiation.

Utilizing extracted information from remote sensing imagery to solve problems, gain insights or understand a target.

The process of collecting remote sensing data, involving both in situ measurements and remote sensing data collection.

A structured approach to problem-solving involving data acquisition, analysis, and information presentation using remote sensing techniques.

A system that collects, stores, manages, analyzes, and displays geographically referenced data. It helps understand patterns and relationships in spatial information.

Spatial data is the core element that distinguishes GIS from other information systems. It's data linked to a specific location on the earth.

Information tied to a specific geographic location like boundaries, roads, or buildings.

Data related to spatial data. It describes features such as population density, soil type, or building height.

GIS offers benefits like reducing data redundancy, integrating data from different sources, maintaining data consistency, updating data easily, storing and retrieving data efficiently, and processing data for analysis and modeling.

GIS combines elements from geography, cartography, computer graphics, surveying, photogrammetry, remote sensing, and space technology.

GIS systems consist of hardware (computers), software (geo-processing engine), data (spatial and attribute), people (GIS professionals), and procedures for managing the system.

Geographic data is expensive to collect, store and manipulate. Large amounts of data are needed for quality studies. Data collection costs more than hardware and software.

A map that displays numerical information about spatial data, such as population density, crop production, or income levels.

A type of quantitative map that uses different shades or patterns to represent the magnitude of a variable in different areas.

A quantitative map that uses lines to connect points of equal value, often used to represent elevation or temperature.

A ratio representing the relationship between distances on a map and corresponding distances on Earth's surface.

A map scale expressed as a ratio, such as 1:50,000, meaning 1 unit on the map represents 50,000 units on the ground.

The process of manipulating and analyzing geographic data to solve complex problems.

It helps identify relationships between spatial features, providing insights for decision-making.

1. Define the problem. 2. Simplify the problem. 3. Gather the necessary data.

A tool that merges polygons in a layer based on shared borders or area. Used to remove thin slivers created during overlays.

Merges adjacent polygons or lines in a layer that share the same User ID.

Creates buffer polygons around features in a layer, expanding or shrinking their boundaries.

Internal buffer: Creates a buffer zone inside the feature, like a shrinking effect. External buffer: Creates a buffer zone outside the feature, like an expanding effect.

GIS operations that process data within a single layer, modifying the geometry of features.

A piece of information stored for each pixel, representing the value at that location. All cells within the same zone share the same value.

The position of a pixel within a raster is generally defined by an ordered pair of coordinates (row and column numbers), identifying its location within the geographic space.

The type of values in a raster depends on the map being coded. For example, a remote-sensing image may have 8-bit values (0-255), while a digital terrain model (DTM) might use real numbers.

The processes involved in handling and manipulating raster data. These include inputting data, general management functions, performing operations on layers, outputting data, and displaying the results.

The simplest way to display raster data is by assigning a unique color to each integer value. A legend explains the meaning of each color.

Operations on raster data where the value of a new pixel depends only on the values of the same pixel in the input layers. Neighboring or distant pixels have no influence.

A local operation that assigns a new value to each unique value in the input layer. Useful when the number of unique values is small.

Raster operations are vital for analyzing and visualizing geographic information. They allow us to extract insights, understand patterns, and make informed decisions based on raster data.