Designing and Using Cached Map
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Transcript of Designing and Using Cached Map
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Agenda
• Introduction of Cache Map Services
• Publish Image service on ArcGIS server
• Discuss caching methods, workflows, best practices
• Question & Answer session
Cached maps are a collection of map images (tiles) organized by scale level. The primary purpose of cached maps is that the images are pre-rendered for fast display and reduces the load on the GIS Server.
What are Cached Maps?
Cache Image Service Key Steps Designing Data
Prepare input datasets Create File Geodatabase Create Mosaic Dataset Built Overviews
Publish Image service Publish an Image Service on ArcGIS Server
Create Cache Projection :Web Mercator Auxiliary Sphere in most cases. Scales, extent and image format. Tile Scheme ESRI/Google/BING Storage –each scale requires 3-4 times storage of previous scale.
Designing Mosaic Dataset
• A GDB data model for managing and serving a collection of images • Supported in FGDB/SDE • Do NOT store pixels but reference them.
• Advantages • Reduce processing time and storage. • Catalog large image collection • Seamless display at all scales • Multiple sensors and metadata
Mosaic Dataset
Authored from Desktop , Publish to ArcGIS Server
• Using Geo processing tool • ArcGIS Editor license • ArcGIS Server Image Extension
Cache Tile Format • PNG • PNG8 • PNG24 • PNG32 • JPEG • MIXED
Storage Format
COMPACT Group tiles into large files called bundles. This storage format is more efficient in terms of storage and mobility. This is the default. EXPLODED Each tile is stored as an individual file. Note that this format cannot be used with tile packages