Notes for WebGIS

• 1. Opening—Talking about WebGIS
  • 1.1. Preface
  • 1.2. Introduction to GIS
  • 1.3. Introduction to WebGIS
  • 1.4. Framework of WebGIS
  • 1.5. Talking about the principle of WebGIS
  • 1.6. Impression
• 2. Exploring the essence,map scale conversion principle shown in webGIS front-end map
  • 2.1. How to do if there is no soymilk machine?
  • 2.2. What if there is no secondary development package?
  • 2.3. Scale and Resolution in the map scale
  • 2.4. Ranks number - Identification of Tile Storage Address
  • 2.5. What is the actual distance represented by 1 pixel on the screen?
  • 2.6. Scale in plane coordinate system and longitude-latitude coordinate system
  • 2.7. Problems caused by inches to centimeters
  • 2.8. Summary
• 3. WebGIS front-end map shows the principle of converting tile ranks number based on geographic scope (core)
  • 3.1. Preface
  • 3.2. Introduction to Image Pyramid
  • 3.3. Conversion principle of tile ranks number
  • 3.4. Application in the actual system
  • 3.5. Conversion process
  • 3.6. Summary
• 4. Offline map of WebGIS converts URLs of multiple tiles by ranks number
  • 4.1. Preface
  • 4.2. ArcGIS cut chart - exploded type
  • 4.3. ArcGIS cut chart - bundle type
  • 4.4. Very common tiles format - tiles of the Land Bureau
  • 4.5. Summary
• 5. Online map of WebGIS converts URLs of multiple tiles by ranks number
  • 5.1. Preface
  • 5.2. URL of WMS service
  • 5.3. WMTS service
  • 5.4. URLs in maps published by common map servers - taking AGS services as an example
  • 5.5. Ask a few questions
  • 5.6. Summary
• 6. Stitching display principle on Canvas of map tiles in WebGIS
  • 6.1. Preface
  • 6.2. Calculation of the screen coordinates of the starting point of the tile in the upper left corner
  • 6.3. Calculation of arbitrary tile screen coordinates
  • 6.4. Tile stitching process
  • 6.5. Front-end map shows the overall process
  • 6.6. Summary
• 7. The nature of rasters, vector layer design, and vector layers in WebGIS
  • 7.1. What is raster data, and what is vector data?
  • 7.2. tps://images0.cnblogs.com/i/656746/201408/190904588312911.png|
  • 7.3. Theoretically induced inference
  • 7.4. The representation of vector layer in WebGIS
  • 7.5. Summary
• 8. Design of raster layers in WebGIS
  • 8.1. Preface
  • 8.2. Raster data acquisition process
  • 8.3. Actual problem
  • 8.4. Ideas
  • 8.5. UML Map
  • 8.6. Detailed explanation of the design of the raster layer
  • 8.7. Optimize the design of raster layers
  • 8.8. Optimized implementation
  • 8.9. Summary
• 9. Vector queries in WebGIS (for AGS and GeoServer)
  • 9.1. Preface
  • 9.2. The essence of vector data
  • 9.3. Source of vector data
  • 9.4. Organization of vector data
  • 9.5. Summary
• 10. The principle of the conversion between geographical and screen coordinates in WebGIS
  • 10.1. Preface
  • 10.2. Conversion premise
  • 10.3. How to obtain these premise parameters
  • 10.4. Conversion formula
  • 10.5. Use of coordinate-based conversion formulas in WebGIS
  • 10.6. Summary
• 11. Design of Features in WebGIS
  • 11.1. Preface
  • 11.2. Thought of feature design
  • 11.3. UML Design
  • 11.4. Problems and solutions
  • 11.5. Explore our design again through design patterns
  • 11.6. Summary
• 12. Design of vector layers in WebGIS
  • 12.1. Preface
  • 12.2. Put out a few needs
  • 12.3. Analyzing requirements
  • 12.4. Design diagram
  • 12.5. Design flow chart
  • 12.6. Detailed by a case
  • 12.7. Summary
• 13. Command mode of design of toolbars in WebGIS
  • 13.1. Background
  • 13.2. Preliminary inquiry
  • 13.3. Introduction to command mode
  • 13.4. Specific implementation of command patterns in the system
  • 13.5. Advantages of using command mode
  • 13.6. Summary
• 14. Design and implementation of map zooming in and out in WebGIS
  • 14.1. Background
  • 14.2. Analysis
  • 14.3. How maps zoom in and out
  • 14.4. Design of zoom-out features
  • 14.5. Optimising the work
  • 14.6. In-depth discussion
  • 14.7. Summary
• 15. Design and implementation of translation function in WebGIS
  • 15.1. Preface
  • 15.2. Design
  • 15.3. Implementation
  • 15.4. Ask two questions
  • 15.5. Summary
• 16. Discussion on the problems caused by offset compensation in WebGIS
  • 16.1. Background
  • 16.2. What is offset compensation?
  • 16.3. Impact of offset compensation
  • 16.4. When does the offset compensation zero?
  • 16.5. Further explore the nature of offset compensation and the problems it causes
  • 16.6. Summary
• 17. A brief introduction to the principle and implementation of distance and area measurement in WebGIS and coordinate conversion
  • 17.1. Background
  • 17.2. From the principle
  • 17.3. Distance conversion formula
  • 17.4. Polygon area conversion formula
  • 17.5. Implementation process
  • 17.6. Specific steps
  • 17.7. Attention problems
  • 17.8. Effect display
  • 17.9. Further exploration
  • 17.10. Summary
• 18. Design and implementation of emptying functions and map location functions in WebGIS
  • 18.1. Background
  • 18.2. Empty function
  • 18.3. Map location function
  • 18.4. Summary
• 19. Principle and Design of I Query in WebGIS(Include AGS、GeoServer、Supermap)
  • 19.1. Background
  • 19.2. Principle
  • 19.3. Design ideas
  • 19.4. Optimising the design
  • 19.5. Effect display
  • 19.6. Summary
• 20. Design and implementation of layer tree functionality in WebGIS
  • 20.1. Background
  • 20.2. Design
  • 20.3. Acquisition and implementation of layer list information
  • 20.4. Implementation of layer feature presentation
  • 20.5. Summary
• 21. The realization of Hawkeye in WebGIS
  • 21.1. Background
  • 21.2. Hawkeye function analysis
  • 21.3. Implementation design
  • 21.4. Linkage of the main image to the eagle eye
  • 21.5. Eagle-eye extent redraw when the main map zooms
  • 21.6. Hawkeye range box drag is the main chart linkage
  • 21.7. Precautions
  • 21.8. Result Display