download PDF - Imaging Notes

More documents

Recommendations

Info

of each state, the HPMS is America’s nationaldatabase of highway information.Roadway extent, use, condition, andperformance data are collected by andfor the states and submitted to the FederalHighway Administration (FHWA)each year. See . From a nationalperspective, the FHWA’s primary intentwith this program is to provide Congresswith a policy tool for major highway legislationand funding decisions.ArcGIS Image Server is an integraltool that allows ADOT to continue toprovide the best administrative, financial,and clerical support possible. Thesoftware has proven valuable for planning,traffic, and feature inventory, andthe agency plans to continue expandingits use to more departments.“The value of imagery is highest whena large number of users have access to thedata quickly,” says Clark Coffey, ArcGISImage Server Product Marketing Manager.“With conventional solutions, imageprocessing and distribution are difficultand time-consuming, and end users havedifficulty accessing and using the imageryin their standard applications. Arc-GIS Image Server is one component tothe image solution, providing a new approachto storing, managing, processing,and distributing geo-imagery.”A company whose staff understandthis well is Sanborn (Colorado Springs,Colo.). Sanborn first became knownback in 1866 through its finely detailedfire insurance maps—maps so well createdthat they are actually still used today.Now part of the DMG InformationGroup of companies, which is ownedby the United Kingdom-based DailyMail and General Trust, Sanborn continuesto provide geospatial solutionsto its clients. Government agencies andcompanies in environmental management,national mapping, utility, andenergy markets rely on them for theirmapping needs.Sanborn was the first commercialmapping firm to develop and implement asystem for producing digital orthophotoimagery without distortion. Sanborn’simages include surrounding streets andother cultural features that are not ordinarilyvisible in standard orthophotos,using a method they developed calledMethod for the Elimination of Terrainand Relief Displacement in Orthophotography(METRO).This type of imagery is being usedby a significant number of GIS users asa useful database layer for topographic,planimetric or cadastral mapping, utilitydata capture and accurate projectanalysis and design implementations.These images are created as both second-generationimagery for clients requiringgeo-referencing to their originalGIS data, and as first-generationorthophotos of the highest accuracy.Many of Sanborn’s imagery projectscover large areas with many customerstakeholders. Customers include largecounties such as Maricopa County,Arizona, as well as councils of governmentand statewide initiatives. Theaverage delivery range of imagery projects’size is 144 Gigabytes for one areato 4.4 Terabytes for up to 30 deliveryareas, based on an average tile size of2000' x 3000' for a delivery area sizeof 2000 tiles—the equivalent of 400square miles. Sanborn’s delivery formatis RGB with a six-inch pixel size.Processing hundreds of terabytes oforthophotos per month for customerslike these required Sanborn to find aninnovative solution for clients who needmassive amounts of imagery for theirapplications without extensive preprocessingor alteration of source data.Sanborn chose ArcGIS Image Serverbecause it provides rapid access to largequantities of file-based imagery, and theability to process on the fly and on demand.The specialties of the two companiesled Sanborn to become an ESRIimplementation partner. “Image Serverallows Sanborn to offer our clients a solutionthat gives them the images theyrequire immediately and with consistency,”says John Copple, chief executiveofficer of Sanborn.Sanborn uses ArcGIS Image Server28IMAGING NOTES // S UMMER 2008 // WWW.IMAGINGNOTES.COM
to diminish the interval between thecollection of an image and its availabilityto users. Traditionally, image processingand distribution have been considered twoseparate stages in image utilization. Imagerywas first processed and mosaickedinto a large dataset, then put on servers fordissemination.This separation has caused manyproblems: long preprocessing and loadingtimes and data redundancy that exacerbatesdata storage issues and hinders efficientdata management. With ArcGIS ImageServer, these two stages are combinedinto one. The data received from an imagerysupplier can be directly served. Thisability enables administrators to maintainthe primary imagery, while creating multiplespecialized products on the fly whenrequired. This is a significant and uniqueparadigm shift in how imagery is managed,processed, and distributed.Using ArcGIS Image Server, Sanborncreated Sanborn Quality Assurance(QA), a client imagery interfacethat facilitates Web-based qualitychecking of Sanborn-created orthophotoimagery products. Clients can viewimagery through a standard Webbrowser as the image is being processedand add digital ‘issue points’ to areaswithin the imagery that they feel mayrequire attention. This real-time errorreporting while Sanborn is processingthe imagery makes data managementmuch more simplified and reduces dataredundancy and the delay in makingthe imagery accessible.Clients can review orthoimagery assoon as they are available on Sanborncomputer systems. Users are grantedentry to the image Web application viasecure login privileges to access a particularproject. Clients may add QAflags to the project to indicate items requiringadditional review, and these becomeimmediately available inside themain GIS for viewing by Sanborn’s productionstaff. There they are immediatelyavailable for technicians to reviewand resolve. These digital issue pointsgive clients the ability to describe errorsefficiently, and in turn, users are ableto make fast, responsive changes suchas color balancing and edgematchingto the imagery. There is also a reportingtool to give up to the minute qualitycontrol status of the project. This toolmakes the problem resolution processmore streamlined and problem-free.All imagery is served from a centralimage server to the client-side computerwithin a mapping interface in a standardWeb browser format. ArcGIS Server 9.2authors map documents that contain theimage server data and QA/QC featuresclasses. ArcSDE technology provides accessto the data. Using this solution, theQA/QC points are immediately readyfor status and resolution, and updates tothe points by the QA team are immediatelyavailable online.Built on fully scalable enterprise client/serverarchitecture, ArcGIS ImageServer offers multiplatform GIS/CAD/Web client access and direct access tomany file formats and compression. Usingthe software, multiple imagery projectscan be created from a single source.Client visibility is granted into projectmanagement with macro-level accessusing a log-in access control with granularsecurity role assignment. A customASP.Net application adds robust security.Resource assignments are now veryeasy and flexible. Users of the system login online using a standard Web-basedbrowser to access their projects.Once logged in, the QA users areshown a list of projects they are able toaccess. By clicking a link from a pulldownmenu called ‘Map,’ the users openthe QA environment for their projects.The initial map that is displayed showsthe individual project status throughcolored pixels, green specifying tilesavailable for review, red for areas notyet available. The user of that projectcan then add and view the current issuepoints for the project.Sanborn prototyped the system withcustomers from Colorado and Texas.Based on their positive prototype experienceand customer feedback, thecompany is releasing a next-generationsystem for use by Maricopa County,Arizona. This county is approximately9200 square miles, with an expecteddata delivery size of around 4.4 terabytes.See .Implementing the system took approximately150 man hours from theIMAGING NOTES // S UMMER 2008 // WWW.IMAGINGNOTES.COM29
Page 3: PUBLISHER’S LETTERBy Myrna James
Page 7 and 8: Dear Reader,Geospatial technologies
Page 9 and 10: is an important and noble exercise
Page 11 and 12: Google Maps, MyLoki, TomTom,Magella
Page 14 and 15: WINNING TOOLS FOR SOCIAL-ENVIRONMEN
Page 16 and 17: REMOTE SENSING COOPERATION BETWEEN
Page 18 and 19: FIGURE 3FIGURE 4FIGURE 5before the
Page 20 and 21: 20IMAGING NOTES // S UMMER 2008 //
Page 22: “The playing field for Earth obse
Page 26 and 27: ARIZONA DOT AND SANBORN USING ArcGI
Page 30: initial design, including determini
Page 35 and 36: FIGURE 3configure both of them. Cus
Page 37 and 38: a program called Enhanced Leases to
Page 39 and 40: platinum sponsors gold sponsors sil

download PDF - Imaging Notes

Create successful ePaper yourself

Delete template?

Save as template?