-
— ouem comtl
Continuation: TABLE No 7
TRIANGULATED BLOCKS WITH THE RADIAL METHOD
No
N
-1
| Survey
| purpose
Country Organization | = | Total area
| |
| Map |
| scale |
| rupe =
SWEDEN The Geographi- |For control of}
| eal Survey! Of- iphoto-mo-|
| fice isaies with|
| low ii
| |
| a & le le |
The State Po- |For dense-|3 blocks of
wer Board ining the gro-|175 models
‚und control
for photo
|maps for geo-|
llogical photo
interpreta -|
tion |
| |
| | Aa
U.K. | Directorate of |1 : 50.000
| Overseas Sur- 1 : 125.000
veys
|
U.S.A. Army Map Ser- 75.000 km?
vice
Geological Sur-
vey
Coast and Geo-
detie Survey
per year
16 blocks
9.300 km?
per year
lof mapping. In the
‘smaller scale map-
|ping a much loo-
iser network has to
|be accepted.
A nine lens 5.000
camera
SHORAN
is frequen-
tly used
30.000 ft. |Existing geodetic
(control or planime-
tric features scaled
[from existing maps
'|are used to control
{the slotted templet
laydowns.
|Ground points at
(each four corner of
leach individual
| block as a minimum
{requirement
|
7% minutes
quadrangle
Concentration of
Overlap and |
|control around pe-
25.000 ft. [sidelap €0%
| Instruments |
used
Flight |
i | Number |
| Photo Auxi- | Ground d pou |
Cameras | scale | Block liary | of control. points |
land flight shape equip- character- in the block
| altitude | ments | istics |
= | | | | |
| | |
| | |
|
LE m SE |
| | Sia |o TET | T |
1 : 40.000 | Each block of | | ; |
labout 50 mo-| | | |
| dels |
|1 : 30.000 Sparsley For 1: 50.000
| : 80.000 linhabita-|mapping the plan
‘ted coun-| controls are positio- |
try ined on a network
about eight - ten
miles apart extend-
ing outside the pe-
irimeter of the block
Stereoplotting
equipment
|
| |
| Time | | Reached
Methods | Adjustment |
| required | precision
|
| | |
| | |
| | |
= 2 | A
|
| |
|
| |
| |
Im + 23 m
Slotted templatedim -- 0,5 mm at
adjustment [the reproduction
scale
Slotted templet me-| 45 hour per
thod photograph
Stereotemplet me-|2 -3 hours |The Stereotemplet|m + 20 ft.
thod of control ex-|per model system is self-ad-
tension. The tem- justing
plets are derived
from a stereoscopic
model and have no
tilt or relief distor-
sion and are ad-
justable in scale
Block adjustment|m + 0,5 mm at
with the radial tri-
angulation method
is used only on
coastal areas where
single lens strip tri-|
angulation is not
feasible
|manuseript scale
\riphery
"d ,
