GISP Test Questions 11/30/2020 with
100% Correct Answers
What file formats are OGC standards? Name the six. - ANSWERSGeotiff
Kml/kmz
LAS
Geopackage
GML
OGC and ISO simple features
Geopackage - ANSWERSUniversal file format for geodata, based on SQLLite
Open Format
Supports vector and raster data
.gpkg extension
FGDC - ANSWERSFederal Geographic Data Committee
NMAS - ANSWERSNational Map Accuracy Standards; the US Bureau of the Budget has been publishing
NMAS since 1941; FGDC clarifies how these standards are tested and proven.
Functions of FGDC - ANSWERSAddressing homes and businesses
Metadata format and content standards
Geographic information data quality
Soil Code standards
Classification of Wetlands
Geospatial Positioning Accuracy Standards
Remote sensing and digital orthoimagery standards
National Standard for Spatial Data Accuracy
,NMAS: What horizontal accuracy is required for larger (1-20000) than 1:20,000 map scale? Percentage? -
ANSWERS1/30"; 90%
NMAS: What horizontal accuracy is required for <1:20,000 map scale, ie (1:100,000)? Percentage? -
ANSWERS1/50"; 90%
According to FGDC, how many check points must be tested for each dataset? Error is checked with
RMSE. - ANSWERS20
"Property" of Length, "Property" of Area - ANSWERSCalculated by the software
How to obtain best data accuracy? - ANSWERSGeoreference correctly with low RMS
Digitize in correct coordinate system
Digitize consistently
Digitize enough vertices
Set fuzzy tolerance and snapping appropriately
123.123456 Precision? Scale? - ANSWERSPrecision of 9
Scale of 6
What field type is needed to store latitude and longitude? - ANSWERSDouble
Raster Imagery Standards - ANSWERSSpatial Data Transfer Standard (SDTS)
SDTS Standards - ANSWERS1. Accuracy testing performed against independent source of higher accuracy
2. Compare identifiable locations on the raster to known ground locations, compute RMSE
3. Raster accuracy should be reported at 95% confidence
4. A minimum of 20 check points should be tested (only <1 can fail for 95% confidence)
, Raster accuracy should be reported at 95% confidence - ANSWERS95% of the positions in the dataset will
have an error equal to or smaller than the reported accuracy value
How to check the accuracy of raster classification? - ANSWERS1. Determine set of sample classes
(random areas)
2. Go out in the field or use photos to "ground truth"
3. Create an error matrix that compares the number of samples correctly identified to the number of
sample points collected.
Accuracy of a pixel's spectral signature depends on ______. - ANSWERSAccuracy of the satellite
What are the four kinds of raster resolution and raster accuracy? - ANSWERS1. Spectral: cell values
proper values (elev or color)?
2. Temporal: raster accurately reflect time period
3. Spatial: proper location?
4. Radiometric: features distinguishable?
FGDC Endorsed Metadata Standards - ANSWERS1. FGDC CSDGM
2. ISO 19115 Original ISO
3. ISO 19115 NAP North American Profile
4. ISO 19139 XML schema implementation
CSDGM - ANSWERSContent Standard for Digital Geospatial Metadata
ISO Mandates for datasets (7) - ANSWERS1. Title
2. Date YYYY-MM-DD hh:mm:ss
3. Language
4. Geographic Location
5. Topic Category
6. Abstract
100% Correct Answers
What file formats are OGC standards? Name the six. - ANSWERSGeotiff
Kml/kmz
LAS
Geopackage
GML
OGC and ISO simple features
Geopackage - ANSWERSUniversal file format for geodata, based on SQLLite
Open Format
Supports vector and raster data
.gpkg extension
FGDC - ANSWERSFederal Geographic Data Committee
NMAS - ANSWERSNational Map Accuracy Standards; the US Bureau of the Budget has been publishing
NMAS since 1941; FGDC clarifies how these standards are tested and proven.
Functions of FGDC - ANSWERSAddressing homes and businesses
Metadata format and content standards
Geographic information data quality
Soil Code standards
Classification of Wetlands
Geospatial Positioning Accuracy Standards
Remote sensing and digital orthoimagery standards
National Standard for Spatial Data Accuracy
,NMAS: What horizontal accuracy is required for larger (1-20000) than 1:20,000 map scale? Percentage? -
ANSWERS1/30"; 90%
NMAS: What horizontal accuracy is required for <1:20,000 map scale, ie (1:100,000)? Percentage? -
ANSWERS1/50"; 90%
According to FGDC, how many check points must be tested for each dataset? Error is checked with
RMSE. - ANSWERS20
"Property" of Length, "Property" of Area - ANSWERSCalculated by the software
How to obtain best data accuracy? - ANSWERSGeoreference correctly with low RMS
Digitize in correct coordinate system
Digitize consistently
Digitize enough vertices
Set fuzzy tolerance and snapping appropriately
123.123456 Precision? Scale? - ANSWERSPrecision of 9
Scale of 6
What field type is needed to store latitude and longitude? - ANSWERSDouble
Raster Imagery Standards - ANSWERSSpatial Data Transfer Standard (SDTS)
SDTS Standards - ANSWERS1. Accuracy testing performed against independent source of higher accuracy
2. Compare identifiable locations on the raster to known ground locations, compute RMSE
3. Raster accuracy should be reported at 95% confidence
4. A minimum of 20 check points should be tested (only <1 can fail for 95% confidence)
, Raster accuracy should be reported at 95% confidence - ANSWERS95% of the positions in the dataset will
have an error equal to or smaller than the reported accuracy value
How to check the accuracy of raster classification? - ANSWERS1. Determine set of sample classes
(random areas)
2. Go out in the field or use photos to "ground truth"
3. Create an error matrix that compares the number of samples correctly identified to the number of
sample points collected.
Accuracy of a pixel's spectral signature depends on ______. - ANSWERSAccuracy of the satellite
What are the four kinds of raster resolution and raster accuracy? - ANSWERS1. Spectral: cell values
proper values (elev or color)?
2. Temporal: raster accurately reflect time period
3. Spatial: proper location?
4. Radiometric: features distinguishable?
FGDC Endorsed Metadata Standards - ANSWERS1. FGDC CSDGM
2. ISO 19115 Original ISO
3. ISO 19115 NAP North American Profile
4. ISO 19139 XML schema implementation
CSDGM - ANSWERSContent Standard for Digital Geospatial Metadata
ISO Mandates for datasets (7) - ANSWERS1. Title
2. Date YYYY-MM-DD hh:mm:ss
3. Language
4. Geographic Location
5. Topic Category
6. Abstract
