Bringing Map Collections to Life in Interactive Web Applications

Transcription

1 FedGIS Conference February 24 25, 2016 Washington, DC Bringing Map Collections to Life in Interactive Web Applications Charlie Frye, Esri

2 1907 1:250,000 Introduction This is Web GIS for printed historical content You will learn why and how ArcGIS brings printed collections to life by taking them from the drawer to the browser :62,500

3 From Drawer to Browser Value Proposition How it is done Create a Plan Collect Metadata Scan Maps Georeference Scans Build a mosaic dataset Creating an image service Configure the web map app Contact Esri to help & details

4 What brings printed collections to life means USGS Historic Topographic Map Explorer

5 More than maps Topographic maps Thematic maps Navigation charts Engineering drawings Atlases Aerial Photo Collections

6 Who needs historical maps? Land Owners & Managers GIS analysts Scientists Courts (adjudication and property disputes) Historians Librarians Genealogists Many others...

7 Value of scanning and sharing Why do people need these maps? A record of Past landscapes How places changed through time Geographical knowledge or perceptions Cartographic and printing technology Knowledge is power Context for History Insights into values, beliefs, and social structures Preservation and/or restoration Francis Bacon Understanding the past is the key to the present and the future Maps of any value should be made available in digital form.

8 1. Start with a plan Learn your organization s mission and needs Prepare yourself to scan and georeference your collection Select Maps: Which maps should be digitized? Are they in a suitable condition to be digitized? Are there (legal) issues (ownership, copyright, etc.) preventing you from distributing the scans? Is the infrastructure and technical ability in place? Test at every stage Determine how people will use the published maps, their needs will drive your designs and priorities

9 Nature of the Collection How will the collection be organized for use? Single or small number of maps Collections Quadrangle maps (coordinates at the corners and along edges) Maps with control points (known geographic references marked on the map) Maps with no control points Create the metadata Inventory the maps Identify and collect required and desired information Story Map or Apps

10 Summary of the workflow Document, Scan & Georeference scanned images Configure & Serve with ArcGIS Server Configure Web App & Share

11 Major post scanning production stages Link Documentation to Scans Attributes (map metadata) Image Service Feature Service Web Maps (TIFFs) Server Folders for Large Collections Master Mosaic Dataset Apps Define Envelopes (footprints) Mosaic Datasets

12 Metadata = Description of each map Information about each map Title, Publication Date, Size, Scale, TIFF File name & path, etc. Information about the control points Create the envelopes Create the mosaic dataset Configure the web map app Excel file

13 Scanning: Inhouse or contracted Range of options and services may be needed Dedicated or borrowed hardware Technology refresh (15yearold scanner = big headache) Need for fixed cost per item to be digitized Rate of production Staffing & costs Acceptance of risk (to maps) There are many solutions Research and find what s right for you

14 Scanning: Technical Scan resolution 400 to 600 PPI.tif format 24bit for color 8bit for grayscale/black & white LZW compression (20x size reduction, no loss) Scan as is without restoration No color tints or lightening of the image Include map collar

15 From map sheets to seamless mosaic Footprint of Map Extent Scanned Map Sheet

16 Georeferencing the scans Align geographic data to a known coordinate system to allow viewing and analysis with other geographic data. Georeferencing involves shifting, rotating, scaling, skewing, or in some cases warping, rubbersheeting, or orthorectifying the data. Maps that are good candidates for georeferencing: Use a known projected coordinate system Have a graticule consistently scaled over the entire map

17 ArcGIS Mosaic dataset Geodatabase data model used to catalog, process, visualize, and share collections of imagery (images, rasters, and LiDAR) data References the source data Defines metadata Defines processing (including projection, clipping enhancement) Provides dynamic mosaicking and processing Use as a catalog and image layer Example: Showing 1:24,000 USGS Quad Map Extents and Footprints Share as image service Optimum method to manage and serve online collections of imagery

18 Creating Envelopes (footprints of map extents) Features to match the scanned map extents Use the Create Envelopes script tool Specify which fields in the metadata table have: North latitude, South latitude, West longitude, East longitude You can modify the envelopes to match the shape of the map on the page to omit legends, cartouches, etc Append the metadata Add the Raster field path to the rasters Convert the time field to date format

19 Creating the mosaic dataset Create an empty mosaic dataset Add Rasters Use Table raster type Use the envelopes feature class as the data source Includes the Raster field with the path to the rasters Update the footprint fields to best control mosaicking Add attribute indexes Update the mosaic dataset properties For display, for time, for the web map app

20 Creating the image service Requires a server, i.e., not possible to do as a hosted ArcGIS Online service Requires ArcGIS Server and the Image Extension for Server software Copy the Mosaic Dataset and scanned images to the server Share the mosaic dataset as an image service Set the service properties Analyze the service Publish the service Open the REST URL

21 Configurable app Download the source code from GitHub: Update the component values View the changes on your own machine Upload the code to a server View the app on the web

22 Help & Quick Start Resources Contact Lee Brinton at Esri for Complete documentation, including: Project planning (under development) Scanning Georeferencing (QuadG and ThematicG are still under development) Creating the mosaic dataset Creating the image services Creating the index map feature service Configuring the web map app Appendices How to install the open source software How to format an Excel table for use with ArcGIS Additional georeferencing examples (under development) Others

23 Don t forget to complete your digital session survey Download the Esri Events app!

24 Please Take Our Survey! Download the Esri Events app and find your event Select the session you attended Scroll down to find the survey Complete Answers and Select Submit

25 Networking Reception Smithsonian National Museum of the American Indian Thursday, 6:30 p.m. 9:30 p.m. Bus pickup on L Street

26 Print your customized Certificate of Attendance Print stations located in the 140/150 Concourse

27 GIS Solutions Expo, Hall A Wednesday, 12:30 p.m. 6:30 p.m. Welcome Social, 5:15 p.m. 6:30 p.m. Thursday, 10:45 a.m. 4:00 p.m. Exhibitors Handson Learning Lab Demo Theaters Esri Showcase

28 Thank you! Charlie Frye, Esri