1、什么是模拟测图、数字测图?
模拟测图:是野外采集数据(角度、距离、高程等),室内或现场计算处理绘制地形图。
数字测图:以计算机为核心在外连输入输出设备硬、软件的支持下,对地形空间数据进行采集、输入、成图、绘图、输出、管理。
2、数字测图有哪些优点:
a、使大比例尺测图走向自动化
b、数字测图使得大比例尺测图走向数字化
c、提高了测图精度
d、数字测图促进了大比例尺的发展、更新
3、简述数字测图的基本成图过程:
采集地形数据、处理、编辑、成图、显示、生成符合国际的地形图、并控制数据绘图仪出图。
4、数字测图需解决那些问题?
首要任务:自动绘制地图图形
1.使采集的图形信息和属性信息为计算机识别。
2.由计算机按照一定的要求对这些信息进行一系列的处理。
3.将经过处理的数据和文字信息转换成图形,由屏幕输出或绘图仪输出各种所需的图形。
4.按照一定的要求自动实现图形数据的应用问题。尤其是满足GIS的需要。
最终目的:实现测图与设计管理的一体化、自动化。
野外数据采集、原图数据采集
6、数字测图和地理信息系统的关系?
7、何谓第一手数据、第二手数据?
第一手数据:主要利用测量仪器进行野外数据采集
第二手数据:利用现有的数据或者图纸、航片等。
8、阐述数字化测图未来的发展
a、成图手段多样化
b、全站仪自动跟踪测量模式
d、3s集成模式
9、数字化测图的作业模式:1、数字测记法2、电子平板法3、业内数字化
1 What is a simulation mapping, digital mapping?
Analog Mapping: Yes, the data collected in the field (angle, distance, elevation, etc.), indoor or on-site computing topographic maps.
Digital Mapping: A computer as the core out with input and output device hardware and software support, terrain and spatial data collection, input, mapping, mapping, output, management.
2, What are the advantages of digital mapping:
a, so that large-scale mapping towards automated
b, makes large-scale digital mapping digital mapping towards
c, improved mapping accuracy of
d, digital mapping for the development of large-scale update
3, outlining the basic Digital Mapping mapping process:
Terrain data collection, processing, editing, mapping, display, generate compliance with international topographic map, and control data plotter plot.
4, the digital mapping required to solve those problems?
Primary task: Automatic mapping graphics
1. To capture the graphical information and attribute information for the computer to recognize.
2. By a computer in accordance with certain requirements for a series of information processing.
3. Will be processed data and text information into graphics, the output from the screen or plotter output all the necessary graphics.
4. In accordance with the requirements of a certain self-fulfilling the application of graphics data. In particular, to meet the GIS needs.
The ultimate goal: achieving the mapping and design management, integration and automation.
5 At present, China What are the main data collection methods?
Field data collection, Original data collection
6, digital mapping and geographic information systems relationship?
7, What is first-hand data, secondary data?
First-hand data: The main advantage of measuring instruments for field data collection
Secondary data: the use of existing data or drawings, aerial photograph, etc..
8, described Digital Mapping the future development of
a, means of diversifying into a diagram
b, automatic tracking total station measurement mode
c, GPS measurement mode
d, 3s integration patterns
9, the digital mapping of the modes of operation: 1, digital mapping notation 2, e-plate method 3, the industry of digital
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