Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

Chapter 4 REFERENCES ON GEOMATICS AND LAND SURVEY SERVICES
4.6 TOPOGRAPHICAL SURVEY (JADUAL 2001 ITEM 2.10 AND ITEM 7.9)
Topographic Surveys often known as Engineering Surveys are conducted to establish horizontal (x, y)
and/or vertical (h or z) positions of points of all natural and manmade features to produce a
geographical details and contour map over a large area. Topographic maps supply a general image
of the earth’s surface namely roads, rivers, buildings, often the nature of the vegetation, the contour
together with spot levels and names of various surveyed objects. The main supplier of topographic
map is the Department of Survey and Mapping Malaysia
4.7 GRID SURVEY (JADUAL 2001 ITEM 7.9.2 AND ITEM 2.2 IN KEMENTERIAN
KEWANGAN KHAZANAH MALAYSIA LETTER REFERENCE (K&B)(8.09)735/3/1
JD.3(13) DATED 13 TH JANUARY 1984).
This survey is special to projects where the difference in spot levels is very important and critical. It
is specified for survey of aircraft runway construction or other flat surface. This type of survey is not
suitable for undulating or hilly area covered by overgrown vegetation.
4.8 SETTING-OUT SURVEY (JADUAL 2001 ITEM 8.10 AND 8.13).
This survey, also known as construction setting out survey, is executed before construction works
can start. The setting comprise x and y coordinates of the following:-
a. Centre line of proposed route from IP to IP (Intersection Points)
b. Right of Way (ROW) of the waterway, canal or drain reserve based on the approved precomputation
plan.
c. Intersection Points (IP) (Jadual 2001 Item 8.10)
d. Pegging of positions of Piling Points based on pre-computation plan from engineering layout
plan
4.9 SURVEY OF EXISTING WATERWAYS, CANALS AND DRAINS (JADUAL 2001
ITEM 8.11 AND 3.10.2)
This survey covers the area within the banks or the designated or gazette reserve for the irrigation
canal or waterway to show the alignment, longitudinal section and the cross-sections. It also
includes the area within the specified Right of Way (ROW) shown on the approved pre-computation
plan. When the reserve is not specified the outer limits of the alignment is within 50m from the
banks of river or drain or canal. If the water depth of the waterways, drains and canal at the time of
survey is more than 1 meter then Jadual 2001 item 8.11 specification (viii) and item 3.10.2 applies
or alternatively Hydrographic Survey for Inland Water Bodies under Paragraphs 4.15 (Jadual 2001
Item 14 Part V) and 4.16 (Jadual 2001 Item 14.9.1 Part V) is applicable. If the width of the crosssections
or the intervals is more or less than 50 metres then the fees shall be increased or decreased
proportionately (specification (vii) Jadual 2001 item 8.11)
4.10 STRIP SURVEY TO MAP DETAILS AND SPOT LEVELS (JADUAL 2001 ITEM 4.9
AND 8.9)
The strip comprises topographic details and spot levels survey of long narrow stretches of areas or
corridors which are beyond the banks or overbanks and flood plains of a waterway or along the
coast.
4-4 March 2009