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sightlines for each property, giving appraisers quantifiable evidence to support view adjustments. Along with this, 3D GIS can recreate a property's view to provide appraisers and customers with qualitative evidence to support, and better understand, the view sightline statistics and resulting assessed value. 3D modeling is one of the many GIS tools that BCA utilizes as part of its overall Desktop Review initiative. rough this continuous innovation, BCA has become widely recognized as one of the world's leading organizations on best practices for property assessment. 3D GIS is an emerging technology in the appraisal industry, and BCA is committed to ensuring this technology evolves to be most beneficial for employees who conduct appraisals. e need for change is critical for BCA to adapt to increasing volumes of work correlated with property growth. As the workforce transforms, technology becomes outdated, and customer needs change, BCA will be active in the exploration of innovative solutions to escalating challenges. About the author Amrit Brar is responsible for exploring and integrating innovative technologies at BC Assessment, with a focus on GIS software. He supports the management and execution of several strategic corporate initiatives regarding GIS implementation, appraisal process enhancement, and website design. TECH TALK Figure 3: Digitally recreating a view using 3D GIS and easily resolved, preventing errors to the assessment roll and to BCA's customers. Views in Vancouver are a significant value driver, and, in many cases, are valued at upwards of $1 million. However, views are a difficult data element to measure without gaining access to the interior of a condo unit. Also, as high-rise towers are rapidly developed throughout downtown, Vancouver's skyline is constantly changing and affecting the view sightlines of older buildings, which create inaccuracies in existing property data. Sightline analysis is the appraisal solution to this difficulty of creating and updating view adjustments (see Figure 2). A A3D provides statistics on the amount of unobstructed view "THE POWER OF 3D GIS ALLOWS THE USER TO COLLECT DATA ON THESE SORTS OF MARKET DRIVERS WITHOUT HAVING TO LEAVE THE OFFICE." Canadian Proper ty Valuation | Évaluation Immobilière au Canada | Volume 58 | Book 4 / Tome 4 | 2014

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