Title: Use of GPS and GIS for field mapping Part II
1Use of GPS and GIS for field mappingPart II
- Wednesday August 25th 2004
2Use 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
3Use 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
4Use 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
5Use 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
6Use of GPS and GIS for field mapping
- Attributes are the questions you ask about the
feature - Values are the answers
7Use 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
8Use 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)
9Use of GPS and GIS for field mapping
10Use of GPS and GIS for field mapping
11Use of GPS and GIS for field mapping
Slide scar
12Use of GPS and GIS for field mapping
13Use of GPS and GIS for field mapping
14- 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)
15- 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)
16- 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
17- 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
18- 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
19- 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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