Post-course review of GIS: Spatial data processing-1. Approximate framework

Source: Internet
Author: User

All attribute values on a geographic surface is related to the other, but closer values is more strongly related than a Re more distant ones. A geographic thing or attribute is related to each other in spatial distribution, and there is a agglomeration (clustering), stochastic (random), rule (regularity) distribution.  
————
Waldo Tobler

The approximate framework for the Spatial data Processing section is as follows:

    1. Coordinate transformation
      • Affine transformations
      • Similarity transformations
      • Two-time transformations
    1. Coordinate projection
      • Positive Solution Transformation
      • Reverse-Solution Transformation
      • Numeric transformations
    2. Data compression
    3. Data quality
      1. Accuracy (accuracy): the degree of proximity between the measured value and the truth.
      2. Accuracy (Precision): The level of detail described in the phenomenon.
      3. Uncertainty (uncertainty)
      4. Compatibility (compatibility): Refers to the ease with which data from two sources is used in the same application. For example, when two graphs are stitched together, the boundary line and type are compatible.
      5. Consistency (consistency): the degree of uniformity in the expression of the same or similar phenomenon.
      6. Completeness (completeness)
      7. Availability (Accessibility): Refers to the ease with which data is acquired or used.
      8. Current issues (timeliness): The index reflects the extent of the current state of the objective phenomenon.
    4. Structural transformations (lots of computer graphics involved)
      • Generally refers to the conversion between vector, raster data: Since the conversion program usually occupies more memory, involving complex numerical operations, this has been one of the technical problems of geographic information system.
      • Vector---grid
      • Grids-Right amount

Post-course review of GIS: Spatial data processing-1. Approximate framework

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.