Esri Image Server
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There are massive collections of scanned maps. But how can you manage them and make them accessible? This presentation will introduce the mosaic dataset that enables the management of large collections of imagery, including scanned maps. Mosaic datasets enable the referencing of the imagery along with associated metadata as well as processes on how to georeference and enhance the imagery. These mosaic datasets can be directly used in ArcGIS for Desktop or served as an image service to a wide range of desktop and web applications. Best practice workflows for working with scanned maps, including georeferencing and the virtual clipping of collar, will be presented.
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Esri Image Server
- 1. Esri Image Server: Making Scanned Maps Accessible Aileen Buckley
- 2. Outline • Why - • There are lots of scanned maps and they have many uses How - Scan - Structure - Create Mosaic datasets - Publish as Image Service - Use in WebMaps
- 3. Scanned Maps • Typically maps created from mapping agencies - Topographic maps - Historic scanned maps - Navigation maps
- 4. Uses of scanned map collections • Authoritative information source • Record for land resource management - Forest plot perimeters - Wetlands - Agriculture - Glaciers - Land/water boundaries - Political boundaries • Historical analysis • Navigation • Adventure/exploration
- 5. How to get the data? • Some can be downloaded - Eg from USGS - Formats - Compressed, Uncompressed - 1-bit, 8-bit, color map - • TIFF, SID Georeferenced? Scan - Flat bend / Large Format - RGB, Pan - 300-600dpi (best to test) -
- 6. Management Considerations • Archive the Raw (uncompressed scans) • Store as - TIF with JPEG compression - RGB compression (not YCbCr) - Test Q values, depend on content (typically about Q80) - Create Pyramids - Use ArcGIS CopyRaster (or FWTools) - Can use other formats - But compressed TIF is fast, and good and open
- 7. Georeferencing • Use the ArcGIS Georeference tool • Ensure appropriate projection and datum are set - • Set TIF file as “read only” Use Update Georeferencing (not Rectify) - Set as Projective, or 2nd Order - Will create associated AUX.XML • Multiple methods to help automate • For large volumes consider QuadG • Do not reproject or rectify • Do not clip borders/legends
- 9. Scanned map example What you want see
- 10. Scanned map example What you want hidden But not always – there is valuable info here!
- 11. How to Manage collections & Metadata • Individual scans can be added directly to ArcGIS - • Will perform required reprojection Use Mosaic Datasets for collections of scanned maps
- 12. What is a mosaic dataset? • A geodatabase data model used to catalog, process, visualize and share your collections of raster, imagery, and lidar data • Indirect data management - Points to the data - Contains metadata • Unlimited size • Provides dynamic mosaicking • & on-the-fly processing • Used as a catalog and an image • Served as an image service
- 13. Simple way to make a mosaic dataset • Create FileGeodatabase • Create Mosaic Dataset • Add Rasters – Point to folders that contain the scanned maps • Edit footprints • Add attributes • Build overviews • Modify properties
- 15. Automation – Further simplifies the process • On the ArcGIS Resource Center • Example of how to automate and simplify the process • A toolbox and scripts (MDCS) • 6 tool & 80 parameters • Customizable
- 16. Publishing the mosaic dataset as an image service • Used for analysis and as background • Best quality – On-the-fly processing • Most functionality – Dynamic mosaicking • Optionally Register with ArcGIS Online • Use in web maps and apps • Query the collection (catalog) • Can enable Export and Download
- 17. Publishing as an Cached Map Service • Creates Static Background • Loose functionality • Simple background • In ArcGIS for Desktop - Package - • Cache Upload In ArcGIS Online - Publish & Share
Notes de l'éditeur
- Presentation Overview: There are massive collections of scanned maps. But how can you manage them and make them accessible? This presentation will introduce the mosaic dataset that enables the management of large collections of imagery, including scanned maps. Mosaic datasets enable the referencing of the imagery along with associated metadata as well as processes on how to georeference and enhance the imagery. These mosaic datasets can be directly used in ArcGIS for Desktop or served as an image service to a wide range of desktop and web applications. Best practice workflows for working with scanned maps, including georeferencing and the virtual clipping of collar, will be presented.
- Canada – national resources canada. www.nrcan.gc.caThese new maps are the next generation of the Centre for Topographic Information’s Toporama product. The National Topographic System (NTS) provides general-purpose topographic map coverage of Canada. These maps depict, in detail, ground relief (landforms and terrain), drainage (lakes and rivers), forest cover, administrative areas, populated areas, transportation routes and facilities (including roads and railways), and other constructed features. The maps use data from the Atlas of Canada (1: 1 000 000 to 1:30 000 000), National Topographic Data Base 1:250 000 and CanVec 1:50 000. Toporama continues to provide topographic information from national to regional scales.UK – Ordinance SurveyUSA - USGS
- Describe the uses of this data to a user Why would you need to manage this type of data?What can you do with this data? How will it be used?Who uses this data?Where is this data used?Scanned maps don’t wear out, cost little to store and it protects and preserves the invaluable original collections.
- Where does it come from?How will it be delivered?#bands, #bits, resolution, formats, types of derived products, raster types, etc
- Describe the dataShow an example datasetWhere does it come from?How will it be delivered?#bands, #bits, resolution, formats, types of derived products, raster types, etc
- Describe the dataShow an example datasetWhere does it come from?How will it be delivered?#bands, #bits, resolution, formats, types of derived products, raster types, etc
- Describe the dataShow an example datasetWhere does it come from?How will it be delivered?#bands, #bits, resolution, formats, types of derived products, raster types, etc
- Reference mosaic datasetReferences an existing mosaic datasetViews of a mosaic datasetMaster mosaic datasetAdded mosaic datasets as raster datasets Added items of sources mosaic datasets added using Table typeProvides better update mechanism
- Mosaic dataset configuration scriptsGet them on the ArcGIS Resource CenterThe package includes a script that will be used to run, optionally the parameters not in the script GUI can be altered in the xml if necessary.On average, this script takes 6 tools with 80 optional parameters and presents the user with just one script tool containing 3 parameters.