GISP 2: Geospatial Data Fundamentals Latest 2023 Graded A+

GISP 2: Geospatial Data Fundamentals Latest 2023 Graded A+ Model (simplified) Simplified static representation What are the three general categories that temporal data may refer to? -discrete events (e.g. lightning strikes) -moving objects (e.g. trains) -repeated observations (e.g. counts from traffic sensors) Geospatial Data is to Food as Metadata is to: Nutrition Label When would temporal time data be stored in a single attribute? When you're collecting data at particular times -e.g. stream flow data (regular intervals), lightning or earthquake data (irregular intervals) What is ISO? The International Organization for Standardization (ISO) is a worldwide federation of national standards bodies. What is temporal data? Data that represents a state in time e.g. land-use patterns of Hong Kong in 1990 What is the simplest definition of metadata? Information about data What are the four types of resolutions in Remote Sensing? -Radiometric -Spatial -Spectral -Temporal Data quality the ability of data to be reliable enough to serve a specific purpose. What are some examples of typical topology errors? -Unmatched intersections -Unsnapped lines -Duplicate elements Why is data quality so important in GIS? Can only obtain meaningful results if data quality is high Resolution Size of smallest measurement unit recorded for an object e.g. pixels for remote sensing What are the two basic, simplified steps of data validation? 1. Check that it fulfills requirements 2. Repair it where it doesn't pass Distance how far the object away from the reference object is Four questions to ask before starting a modeling process? 1. What do we want the model to tell us? 2. What type of data do I need? 3. How do I create a design to put the model together? 4. How do I apply existing tools to create a meaningful model? What is FGDC? Federal Geographic Data Committee -US government committee -Promotes coordinated development, use, sharing, and dissemination of geospatial data nationally What are some reasons why temporal data is collected? -analyze weather patterns -analyze environmental variables -monitor traffic conditions -study demographic trends How is metadata similar to a library catalog? It records the who, what, when, where, how, and why of a data resource What are the steps to checking a data model? Check the: -Attribute names and types. -Coordinate system -Feature type (re class) names -Allowed geometries Data Completeness Measure of totality of features What is geospatial metadata specifically? Describes location-based data resources What is another term for "Resolution"? Measurement scale What is the relationship between SDTs and SQLs? SDTs are