Data Acquisition and Preprocessing Techniques

Description: This quiz will test your knowledge on Data Acquisition and Preprocessing Techniques used in Remote Sensing and GIS.
Number of Questions: 15
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Tags: remote sensing gis data acquisition preprocessing
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Which of the following is a commonly used method for acquiring remotely sensed data?

  1. Active Remote Sensing

  2. Passive Remote Sensing

  3. Both Active and Passive Remote Sensing

  4. None of the above


Correct Option: C
Explanation:

Both active and passive remote sensing are commonly used methods for acquiring remotely sensed data. Active remote sensing involves sending out a signal and measuring the reflected or scattered signal, while passive remote sensing involves measuring the natural radiation emitted or reflected by an object.

What is the process of converting raw remotely sensed data into a usable format called?

  1. Data Preprocessing

  2. Data Processing

  3. Data Analysis

  4. Data Interpretation


Correct Option: A
Explanation:

Data preprocessing is the process of converting raw remotely sensed data into a usable format. It involves a series of steps such as radiometric correction, geometric correction, and atmospheric correction.

Which of the following is a common radiometric correction technique used to remove the effects of sensor gain and offset?

  1. Histogram Equalization

  2. Linear Contrast Stretching

  3. Normalization

  4. All of the above


Correct Option: D
Explanation:

Histogram equalization, linear contrast stretching, and normalization are all common radiometric correction techniques used to remove the effects of sensor gain and offset.

What is the process of correcting geometric distortions in remotely sensed data called?

  1. Geometric Correction

  2. Radiometric Correction

  3. Atmospheric Correction

  4. Data Preprocessing


Correct Option: A
Explanation:

Geometric correction is the process of correcting geometric distortions in remotely sensed data. It involves correcting for errors such as image skew, rotation, and scale.

Which of the following is a common geometric correction technique used to correct for image skew?

  1. Affine Transformation

  2. Polynomial Transformation

  3. Rubber Sheeting

  4. All of the above


Correct Option: D
Explanation:

Affine transformation, polynomial transformation, and rubber sheeting are all common geometric correction techniques used to correct for image skew.

What is the process of removing the effects of the atmosphere from remotely sensed data called?

  1. Atmospheric Correction

  2. Radiometric Correction

  3. Geometric Correction

  4. Data Preprocessing


Correct Option: A
Explanation:

Atmospheric correction is the process of removing the effects of the atmosphere from remotely sensed data. It involves correcting for errors such as atmospheric scattering, absorption, and path radiance.

Which of the following is a common atmospheric correction technique used to correct for atmospheric scattering?

  1. Dark Object Subtraction

  2. Radiative Transfer Model

  3. Empirical Correction

  4. All of the above


Correct Option: D
Explanation:

Dark object subtraction, radiative transfer model, and empirical correction are all common atmospheric correction techniques used to correct for atmospheric scattering.

What is the process of enhancing the visual appearance of remotely sensed data called?

  1. Image Enhancement

  2. Data Preprocessing

  3. Data Processing

  4. Data Analysis


Correct Option: A
Explanation:

Image enhancement is the process of enhancing the visual appearance of remotely sensed data. It involves a series of techniques such as contrast stretching, color balancing, and filtering.

Which of the following is a common image enhancement technique used to improve the contrast of an image?

  1. Histogram Equalization

  2. Linear Contrast Stretching

  3. Normalization

  4. All of the above


Correct Option: D
Explanation:

Histogram equalization, linear contrast stretching, and normalization are all common image enhancement techniques used to improve the contrast of an image.

What is the process of extracting meaningful information from remotely sensed data called?

  1. Data Analysis

  2. Data Preprocessing

  3. Data Processing

  4. Image Enhancement


Correct Option: A
Explanation:

Data analysis is the process of extracting meaningful information from remotely sensed data. It involves a series of techniques such as classification, regression, and change detection.

Which of the following is a common data analysis technique used to classify remotely sensed data?

  1. Maximum Likelihood Classification

  2. Support Vector Machine

  3. Decision Tree

  4. All of the above


Correct Option: D
Explanation:

Maximum likelihood classification, support vector machine, and decision tree are all common data analysis techniques used to classify remotely sensed data.

What is the process of interpreting the results of data analysis called?

  1. Data Interpretation

  2. Data Preprocessing

  3. Data Processing

  4. Image Enhancement


Correct Option: A
Explanation:

Data interpretation is the process of interpreting the results of data analysis. It involves drawing conclusions and making decisions based on the analyzed data.

Which of the following is a common data interpretation technique used to identify patterns and trends in remotely sensed data?

  1. Visual Interpretation

  2. Statistical Analysis

  3. Geospatial Analysis

  4. All of the above


Correct Option: D
Explanation:

Visual interpretation, statistical analysis, and geospatial analysis are all common data interpretation techniques used to identify patterns and trends in remotely sensed data.

What is the process of presenting the results of data interpretation in a clear and concise manner called?

  1. Data Visualization

  2. Data Preprocessing

  3. Data Processing

  4. Image Enhancement


Correct Option: A
Explanation:

Data visualization is the process of presenting the results of data interpretation in a clear and concise manner. It involves creating maps, charts, graphs, and other visual representations of the data.

Which of the following is a common data visualization technique used to display the spatial distribution of data?

  1. Choropleth Map

  2. Dot Map

  3. Line Map

  4. All of the above


Correct Option: D
Explanation:

Choropleth map, dot map, and line map are all common data visualization techniques used to display the spatial distribution of data.

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