Mr. Erik Berg-Johansen <br />August 14, 2015 <br />Page 4 <br />The location of points along the zoning boundaries in the digital version is computed as vectors <br />from a point of origin. Given that all of LCOG's mapping data is provided by Lane County, the <br />mapping is (by law) depicted in the Oregon State Plane Coordinate System (1983). This is one of <br />numerous cartographic systems which could be used to project map features from the roughly <br />spherical surface of the earth onto a flat surface. <br />The Oregon State Plane Coordinate System's central meridian is located in Central Oregon. The <br />map on the next page illustrates the effect this projection has on azimuths of lines in different areas <br />of the state. The central meridian, dividing the state into an eastern and western half, points to <br />"True North" (the rotational North Pole of the Earth). However, with increasing distance eastward <br />and westward from the meridian, lines actually pointing to True North are subject to increasing <br />rotation toward the meridian at their northern end and no longer run straight up and down on the <br />projection. Similarly, east-west lines tend to be rotated to remain perpendicular to the N-S lines. <br />In the Eugene area, which is located approximately 125 miles west of the meridian, the rotation <br />imparted by the projection is right around 2 degrees (clockwise). As a result, lines running True <br />North - South are depicted rotated 2° clockwise relative to "Grid North" of the State Plane <br />Coordinate System, which is "straight up" on the map. <br />Consequently, as a result of this cartographic projection convention, the entire Metro Plan <br />Diagram, as adopted by the City of Eugene in 2004, appears to be rotated clockwise by 2 degrees. <br />On the original diagram, as presented in Exhibit C by the applicant (and following this page), the <br />North Arrow (pointing to True North) is rotated correspondingly. <br />However, on the version of the Metro Plan currently displayed at the link to LCOG from the City's <br />website ( http://www.Icog.org/DocumentCenterNiew/144 the north arrow is pointing straight up. <br />This version was in place at the time Schirmer-Satre submitted their application in May of 2015. <br />When this was noted in the wake of the submission of the Zone Change application, LHVC made <br />an inquiry with LCOG's Senior GIS Specialist Bill Clingman as to the fact that the Metro Plan <br />Diagram appeared to be rotated 2 degrees from True North. Mr. Clingman researched the issue, <br />and determined that a change had recently occurred in the ESRI GIS software which LCOG and <br />many other governmental agencies utilize. According to professional blogs, GIS specialists had <br />noted and complained about the change. They had also determined that alignment of the map's <br />north arrow with True North now requires significant work-arounds such as using an image file to <br />replace the previously self-calculating north arrow. <br />Why and how does this matter for the issue of determining the area of POR zoning on the Laurel <br />Ridge PUD property? It matters only because Schirmer-Satre chose the north arrow on the <br />diagram as one of two "referents". This seemingly minor rotation results in a significant decrease <br />of the area of POS zoning designation on the property. <br />