Use of GPS and GIS for field mapping Part II

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Use of GPS and GIS for field mappingPart II

• Wednesday August 25th 2004

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Use of GPS and GIS for field mapping

• A Basic principles of GPS
• B Basic use of a GPS receiver
• C GPS for GIS some basics
• D Exercise into the field to practice
• E Back from the field what to do with the
  data ? GIS and GPS-logs

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Use of GPS and GIS for field mapping

• Position Format Lat - Long
• hdddmm.mmm N 2728.392
• E08938.129
• hdddmmss.s N 272823.5
• E0893807.7
• hddd.ddddd N 27.47320
• E089.63548
• India Zone 1A 4872347
• 0573876

DGM gate
23.5/60 .392
7.7/60 .129
28.392/60 .47320 38.129/60 .63548
Thimphu UTM 45R
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Use of GPS and GIS for field mapping

• Feature Types
• Points single GPS coordinate
• Lines collection of GPS coordinates, with
  the same object and linked together to form a
  line
• Areas collection of GPS coordinates with the
  same object where the ends of a line close

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Use of GPS and GIS for field mapping

• Describing features
• The ability to describe a feature is essential
  for integration with any GIS.
• Categories of descriptions for a feature are
  known as attributes
• neo-tectonic fault line
• 2m displacement
• quartzite

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Use of GPS and GIS for field mapping

• Attributes are the questions you ask about the
  feature
• Values are the answers

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Use of GPS and GIS for field mapping

• Feature List
• For a good transfer to a GIS a feature list is
  very useful
• A database with a listing of features to be
  mapped together with associated attributes and
  values

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Use of GPS and GIS for field mapping

• Exporting to a GIS
• To export the GPS (location) data and feature
  data (object data) to a GIS
• For every feature a GIS layer is created
• Fault line (line)
• Rock samples (point)
• Formation boundary (area)

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Use of GPS and GIS for field mapping
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Use of GPS and GIS for field mapping
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Use of GPS and GIS for field mapping
Slide scar
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Use of GPS and GIS for field mapping
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Use of GPS and GIS for field mapping
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• Feature Types and DGM
• Geochemical and Geotechnical Labs
• Point data (samples water, rock or soil also
  possibility to do proximity mapping ?
  interpolation between point data ? polygons)
• Drilling Unit
• Point data (drilling sites) ? linkage to data
  base related to drill core ? core logging
• Mines
• Point, line and area data (location of mines,
  boundaries/infrastructure and area/surface also
  connection with mining data base)

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• Feature Types and DGM
• Mineral exploration
• Point, line and area data (samples, litho-units
  and faults/joints etc.)
• Geological mapping
• Point, line and area (description points,
  lineations and Formation boundaries)

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• Feature Types and DGM
• Geotechnical studies / engineering geology
• Point, line and area (samples / point
  description,
• road alignment, areas of instability /
  geotechnical material boundaries) Also? slope
  model / DTM-DEM
• GIS-RS unit
• They deal with any data type youll give them
  but youll have to prepare these data

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• Exercise 1
• One of the mining engineers found out that there
  is an important body of coal located directly
  underneath the DGM parking lot. He needs data on
  the total surface area and depth and quality of
  the coal
• Locate the corner points and 1 middle point for
  drilling/sampling purposes
• Make a feature list

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• Exercise 2
• One of the geologists found out that there is an
  important gold seam located directly besides the
  DGM parking lot (between the wall and the new
  flower beds besides the building? behind the
  truck). He needs data on the total surface area
  and depth and quality of the gold
• Locate the corner points and 1 middle point for
  drilling/sampling purposes
• Make a feature list

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• Exercise 3
• The seismologist of DGM is worried about the wall
  on the edge of the DGM area. He suspects that
  this wall is built exactly on a neo-tectonic
  fault line. He needs to know the precise location
  of this line
• Measure the fault line (the wall? from the store
  to the new flower bed towards the PMs office)
• Make a feature list

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