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ARIZONA DOT AND SANBORN USING ArcGIS IMAGE SERVERBoth public and private organizations are findingthat the volume of imagery available tothem is growing at a rapid rate. At the sametime, however, the importance of updated andcurrent imagery, including aerial and satellite,is also growing. Decision makers in manyorganizations need the latest high-quality imagesto visualize and analyze activities such asland use, forest quality, military operations,and emergency situations.Geographic information system (GIS)users are especially interested in the increasingavailability of imagery. Whetherserving as a natural background forGIS applications, as a vehicle for directinterpretation of data, as a basis for statisticsand analysis, or as the source formany vector maps, imagery has manydemands placed upon it. While hugevolumes of imagery from many sourcesexist today, accessibility to this data isa challenge, and as a result only a fractionof what is available is actually accessed.Increasing access to the imageryincreases its value, and since images area snapshot in time, the faster they aremade available, the more useful theyare to those who need them.Arizona’s Multimodal PlanningDivision (MPD) of the Arizona Departmentof Transportation (ADOT)provides high quality transportationresearch, plans and programs to thepublic. “GIS is a necessary tool forArizona to plan, analyze, model andmanage our information,” says JamesMeyer, Senior GIS Analyst, ADOT. “Ithas really helped us provide a visualarray of information that allows ourusers to understand easily the complexenvironmental, economic and social issues.GIS is also useful as an effectivetool for bringing people together on thesame page when discussing programsand policies in the state.”The central objectives of MPD are tohelp identify current significant transportationissues in Arizona and to improveexisting systems. MPD is alsocommitted to cost effectively maintain-Writer, ESRIRedlands, Calif.www.esri.com/imageserver26IMAGING NOTES // S UMMER 2008 // WWW.IMAGINGNOTES.COM
FIGURE 1FIGURE 2.ing and expanding the state’s transportationinfrastructure. An ESRI GIS userfor many years, the ADOT geographicinformation system and transportationsection maintains the statewide streetcenterline GIS database and coordinatesGIS issues for ADOT. Primarily focusedon the more than 6200-mile state highwaysystem, the section maintains theGIS database, also known as the ArizonaTransportation Information System(ATIS Roads), and is the foundation formany planning studies and programs,including supporting the Federal HighwayPerformance Monitoring System(HPMS) for the state of Arizona.ATIS Roads originated from the AccidentLocation Information SurveillanceSystem (ALISS) map base thatwas maintained using photogrammetryand mapping until its conversion toGIS in the early 1990s. What began asa simple drawing tool has now growninto a full GIS.One of the ongoing projects of ADOTis the ATIS Roads Update, which is themost important work of the group, sinceit is the basis for all the GIS data at the organization.This street centerline file forthe state of Arizona is used to referenceroutes and mileposts that are geocodedto the Linear Referencing System and displayedon the maps. All data in ADOTuses the standard ATIS nomenclature forreferencing location. See .To assist in this update, ADOT adoptedArcGIS Image Server. “Usingimagery, it is easy for us to identify areaswhere the streets in our databasedon’t match up with real-world information,”says Meyer.Four terabytes of imagery are usedto verify ground data. Once an ominoustask for the department, today using thismuch raster data is an efficient means ofviewing and analyzing its information.“Before ArcGIS Image Server, looking atimages of the road network meant hookingup an extra hard drive and siftingthrough 8,000 tiles,” says Meyer. “UsingImage Server, we are able to viewone continuous image quickly throughoutthe department on our network.”This usage is possible because of Arc-GIS Image Server mosaics and because itprocesses imagery on the fly, providingusers with the seamless image productsthey need without having to save multiplecopies of the same image or performtime-consuming image pre-processing.ADOT is able to let users throughout theplanning department access the most currentimagery available. “This has takenout any reason to have data redundancythroughout the agency,” says Meyer. “Italso means we save money by not havingto deal with extra storage requirements.”Many users at ADOT are new toGIS, so they are unfamiliar with the traditionalmeans of loading and lookingat images. “ArcGIS Image Server makesit easy for non-GIS users to view data inthe way they are used to—quickly andintuitively. They don’t think twice aboutthe amount of data they are viewing orhow quickly they can access it. This hashelped us to support many more usersthan previously and to expand the useof GIS data throughout the whole organization,”says Meyer.MPD’s goal is that ArcGIS ImageServer will be adopted by other non-GIS departments such as the CAD Department.Potentially, CAD users willbe able to perform quality assurance/quality control (QA/QC) on their surveydata and measure the ground truth withthe images. “We are hoping that ArcGISImage Server will support all of ADOT’saerial image needs,” says Meyer.ArcGIS Image Server is also importantin supporting the continuing efforts of theHighway Performance Monitoring System(HPMS) submittals. A requirementIMAGING NOTES // S UMMER 2008 // WWW.IMAGINGNOTES.COM27
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
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Page 28 and 29: of each state, the HPMS is America
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Page 37 and 38: a program called Enhanced Leases to
Page 39 and 40: platinum sponsors gold sponsors sil

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