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• Zone districts <br />• Tax lot boundary <br />• Improvement value <br />4. The Process <br />• Water quality management areas (per <br />Statewide Planning Goal 6) <br />• Natural Resource zoned areas <br />• Public parks <br />• Other publically owned lands <br />• Slopes and elevation <br />• Historic Sites <br />The foundation for identifying Eugene's 2012 residential land supply is a location -based (geospatial') <br />model that was used to create the land supply layer. The land supply process is divided into five (5) main <br />steps or phases. The first three steps were completed within the model and steps 4 and 5 used the <br />results of the model: <br />1) Acquire and evaluate the data; obtain and review the data layers as to their suitability for <br />use in the analysis, including resolving any quality issues, and develop a methodology for <br />applying that data. <br />2) Create a land supply layer; combine all the geographic features together to create a single <br />integrated land supply layer. <br />3) Classify land into types; do a sub -tax lot level analysis that classifies the thousands of <br />pieces of the land supply layer into one of four types of land (committed, protected, <br />developed, vacant—specific definitions are presented in Step 3, below) by comprehensive <br />plan designation. <br />4) Identify additional capacity; identify underdeveloped sites that the model initially classified <br />as developed. <br />5) Summarize the results; summarize the 2012 land supply using tables, charts and maps and <br />provide information to help answer the larger question – how do we meet the demand for <br />land of different types over the next 20 years? <br />The illustration below provides a simplified view of the model analysis used to create the land supply, <br />showing how numerous sources of data and assumptions were processed using a series of geographic <br />models. <br />3 "Geospatial analysis is an approach to applying statistical analysis and other informational techniques to data <br />which has a geographical or geospatial aspect. Such analysis would typically employ software capable of geospatial <br />representation and processing, and apply analytical methods to terrestrial or geographic datasets, including the <br />use of geographic information systems and geomatics." (Wikipedia contributors. "Geospatial analysis." Wikipedia, <br />The Free Encyclopedia, 7 Apr. 2015. Web. 19 May. 2015) <br />Residential Land Supply Study I Final Part I — Page 3 <br />