Bringing Map Collections to Life in Interactive Web Applications

FedGIS Conference February 24–25, 2016 | Washington, DC Bringing Map Collections to Life in Interactive Web Applications Charlie Frye, Esri cfrye@esr...
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FedGIS Conference February 24–25, 2016 | Washington, DC

Bringing Map Collections to Life in Interactive Web Applications Charlie Frye, Esri [email protected]

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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

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From Drawer to Browser



Value Proposition



How it is done -

Create a Plan

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Collect Metadata

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Scan Maps

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Georeference Scans

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Build a mosaic dataset

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Creating an image service

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Configure the web map app

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Contact Esri to help & details

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1995

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What “brings printed collections to life” means

USGS Historic Topographic Map Explorer http://historicalmaps.arcgis.com/usgs/

More than maps



Topographic maps



Thematic maps



Navigation charts



Engineering drawings



Atlases



Aerial Photo Collections

Who needs historical maps?



Land Owners & Managers



GIS analysts



Scientists



Courts (adjudication and property disputes)



Historians



Librarians



Genealogists



Many others . . .

Value of scanning and sharing



Why do people need these maps?

A record of -

Past landscapes

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How places changed through time

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Geographical knowledge or perceptions

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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.

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?

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Are they in a suitable condition to be digitized?

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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

Nature of the Collection



How will the collection be organized for use? -

Single or small number of maps

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Collections -

Quadrangle maps (coordinates at the corners and along edges)

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Maps with control points (known geographic references marked on the map)

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Maps with no control points

Create the metadata -

Inventory the maps

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Identify and collect required and desired information

Story Map or Apps

Summary of the workflow

Document, Scan & Georeference scanned images

Configure & Serve with ArcGIS Server

Configure Web App & Share

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

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

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Create the mosaic dataset

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Configure the web map app

Excel file

Scanning: In-house or contracted



Range of options and services may be needed



Dedicated or borrowed hardware



Technology refresh (15-year-old 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

Scanning: Technical



Scan resolution 400 to 600 PPI



.tif format



24-bit for color



8-bit 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

From map sheets to seamless mosaic

Footprint of Map Extent Scanned Map Sheet

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

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Have a graticule consistently scaled over the entire map

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

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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

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

Creating the mosaic dataset



Create an empty mosaic dataset



Add Rasters -

Use Table raster type

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Use the envelopes feature class as the data source

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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

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



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Set the service properties

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Analyze the service

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Publish the service

Open the REST URL

Configurable app



Download the source code from GitHub: -

https://github.com/Esri/map-collection-explorer



Update the component values



View the changes on your own machine



Upload the code to a server



View the app on the web

Help & Quick Start Resources



Contact Lee Brinton ([email protected]) at Esri for



Complete documentation, including: -

Project planning (under development)

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Scanning

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Georeferencing (Quad-G and Thematic-G are still under development)

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Creating the mosaic dataset

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Creating the image services

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Creating the index map feature service

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Configuring the web map app

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Appendices -

How to install the open source software

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How to format an Excel table for use with ArcGIS

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Additional georeferencing examples (under development)

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Others

Don’t forget to complete your digital session survey Download the Esri Events app!

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”

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

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

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 • Hands-on Learning Lab • Demo Theaters • Esri Showcase

Thank you! Charlie Frye, Esri [email protected]