GIS Professional (GISP)

International · GIS Certification Institute · professional · unverified source

29practice questions written to this syllabus
2subjects

Format

Unverified. Portfolio of education, experience and contributions plus a geospatial core technical knowledge exam.

Sections

Over the years

Unverified. Relevant to forest GIS and inventory analysts.

Official source: https://www.gisci.org/

Subjects this exam draws on

Forest Surveying & Mapping10 questionsForest GIS, GNSS & LiDAR Analytics19 questions

Five practice questions, worked

Original questions written to this exam's published syllabus and pattern. Not past papers.

1. How many satellites must a GNSS receiver track for a three-dimensional fix?

  1. 3
  2. 2
  3. 6
  4. 4
Answer and working

D. 4

Four unknowns: three coordinates and receiver clock offset.

Forest Surveying & Mapping · GNSS in forest survey and its accuracy under canopy

2. What is the central meridian of UTM zone 33?

  1. 18° E
  2. 12° E
  3. 33° E
  4. 15° E
Answer and working

D. 15° E

Central meridian = 6n − 183 = 6 × 33 − 183 = 15° E. Zone 33 spans 12° E to 18° E, so 12° and 18° are its edges, not its centre.

Forest GIS, GNSS & LiDAR Analytics · GIS concepts: vector and raster data, projections, datums

3. Which receiver set-up improves GNSS accuracy under canopy?

  1. Single-constellation unit held at waist height
  2. Phone inside a pocket for warmth
  3. Any receiver with the PDOP mask removed
  4. Multi-constellation receiver with a raised antenna
Answer and working

D. Multi-constellation receiver with a raised antenna

More satellites and an antenna above the understorey improve tracking; removing DOP masks admits poor fixes.

Forest Surveying & Mapping · GNSS in forest survey and its accuracy under canopy

4. A stand has had many thinnings and fertiliser treatments over its life. The best database design for recording them is:

  1. A related treatment table with one row per treatment
  2. Ten extra columns in the stand table, one per treatment
  3. A duplicate stand polygon drawn for each treatment
  4. A free-text note field in the stand table
Answer and working

A. A related treatment table with one row per treatment

One-to-many data belong in a related table keyed by stand identifier (normalisation). Repeating columns limit the number of treatments and duplicate polygons create overlapping areas.

Forest GIS, GNSS & LiDAR Analytics · Forest stand and compartment databases

5. An analyst wants to read only one small window of a very large image stored online without downloading it all. Which format feature makes this possible?

  1. A compressed archive of the whole image
  2. Conversion of the image to a vector layer
  3. A printed map of the image at small scale
  4. A cloud-optimised raster with internal tiles
Answer and working

D. A cloud-optimised raster with internal tiles

Cloud-optimised formats are internally tiled with overviews so that clients request only the needed byte ranges.

Forest GIS, GNSS & LiDAR Analytics · Open data and cloud platforms for forest monitoring

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