- tt白
-
在本文中,我们比较平面使用RTINs的记忆要求和二次曲面的修补程序。(我们还简化在RTINs中的代码快速近似计算。 ) RTINs性比一般TINs为栅格数据提供更有益的表述,因为它们提供了一个等级的详细程度,而不只是一个单一的层次。因此,我们认为其更多的三角形,抵消了每个小三角的尺寸,使之更优化。用多项式曲面片面数的多少取决于储存的每个三角形或每顶点数据. 由于曲线片面数可以使用更少的三角形,有更广泛的数据优化三角形的摆幅图片和多项式片面数。也可以说是优化了多项式表面,以使内部网格点更紧密。我们只用二次曲面,但它也可用于立体面。用程度较高的多项式就支使用较多的内存来储存更多的系数,但对网格点的紧密不一定有助。事实上,多项式片面数的程度5或增高趋势倍受争议。
- LuckySXyd
-
随着科学技术的迅速发展,测绘新仪器、新模式也不断出现。全球定位系统(GPS)的建立和RTK技术的应用,以其全天候、高精度、高效益、等特色深受测绘行业的宠爱。
With
the
rapid
development
of
science
and
technology,
new
equipment
and
new
model
of
surveying
&
mapping
also
appear
continuously.
The
establishment
of
Global
Positioning
System
(GPS)
and
application
of
RTK
technology
has
won
the
favor
of
surveying
&
mapping
industry
deeply
with
their
characteristics
of
all-weather,high
precision,high
benefit
and
so
on.
RTK技术是GPS定位技术的重大突破,RTK这一高新技术的应用给传统测量带来了革命性的变革,极大地推进了测绘行业的技术进步,它既克服了常规测量要求点间通视,费工费时而且精度不均匀,外业不能实时知道测量成果和测量精度的缺点,又简化了常规测量遵循分级布网、逐级控制的步骤,还减少了繁琐的内业计算。
RTK
technology
is
a
great
breakthrough
in
GPS
positioning
technology
and
its
application
birngs
revolutionary
change
to
traditional
measurement
which
promotes
the
technical
progress
of
surveying
&
mapping
industry.
RTK
technology
overcomed
disadvantages
of
routine
measurement
such
as
requires
inter-visibility
between
points,labour
and
time
consuming,accuracy
nonuniform,measurement
results
and
precision
couldn"t
be
acquainted
with
field
surveying
in
real
time.
What"s
more,
RTK
technology
simplified
steps
of
grading
network
and
gradual
control
which
were
followed
in
routine
measurement
and
reduced
tedious
calculation
of
interior
work
as
well.
但是GPS
RTK的精度也受到卫星、天空环境、高层异常等限制,本文介绍了GPS的背景、现状以及其发展和照以往的光学仪器的优缺点,并以因泰克GPS
RTK为样本,介绍了GPS
RTK的组成、基本原理和操作。其中操作部分对PDA上的软件安装、基准站的建立和转换参数的求解、移动站的操作、点放样等方面进行了详细的说明。
However,
GPS
RTK
precision
were
restricted
by
satellite,sky
environment,high-rise
abnormal
and
so
on.
In
this
article,
GPS
background,present
situation
and
development
were
introduced.
Compared
with
merits
and
demerits
of
conventional
optical
instruments
and
take
Tek
GPS
RTK
as
sample,
the
compositions,basic
principles
and
operation
of
GPS
RTK
were
also
introduced.
In
operation
part,the
installation
of
PDA
software,
establishment
of
base
station,
solution
of
transformation
parameters,
operation
of
moving
points,
point
setting-out
etc.
were
explained
in
detail.
本文的最后一章通过检验RTK在地形图修测中控制测量和碎步测量的精度与性能进行比较分析,给出GPS
RTK在基准站选择、测量方法和测量时段等方面提高精度的方法。(这句中文结构太混乱了!翻的不好)
In
last
chapter
of
the
article,
by
testing
RTK
in
topography
repairing
and
survrying
makes
a
comparative
analysis
on
precision
and
performances
of
control
survey
and
details
survery,
methods
of
improving
precision
for
GPS
RTK
in
selection
of
base
station,
measurement
method
and
period
were
given.