I know what [it] must show during the application process." Lee, 57 Or App at 802. In <br />2 addition, we disagree that ORS 227.173(1) requires that a method of measuring slope must be <br />3 included in the development ordinance in order to determine whether the 20 percent standard <br />4 is met. No party disputes that the most straightforward way to determine slope, if not the <br />5 only way, is to compare vertical rise to horizontal distance, expressed as a fraction <br />6 ("rise/run"). EC 9.8325(5) does not specify the size of the vertical or horizontal distance <br />7 being compared. The city's application form requests that applicants provide a slope map <br />8 using a 5-foot vertical rise. West Creels submitted a total of three slope maps, one based on <br />9 5-foot intervals, one based on the width of the entire property, and one based on 20-foot <br />10 contour intervals. The city chose to base its decision on the 5-foot interval slope map, and <br />11 West Creek disagrees with that choice. But West Creek clearly understood how to <br />12 demonstrate slope, and the fact that it preferred using a larger vertical or horizontal distance <br />13 to determine slope than the city preferred does not demonstrate that EC 9.8325(5) is <br />14 impermissibly vague or unclear in violation of ORS 227.173(1). State ex Rel West Main <br />15 Townhomes v. City of Medford, 233 Or App 41, 225 Pad 56 (2009), modified and adhered to <br />16 on reconsideration 234 Or App 343, 228 P3d 607 (2010). <br />17 West Creek's first and second cross assignments of error are denied. <br />18 B. Southeast Neighbors' First Assignment of Error <br />19 During the proceedings before the hearings officer, Southeast Neighbors submitted <br />20 the Matthews Slope Map into the record. The Matthews Slope Map measured the slopes on <br />21 the property based on a copy of the same staff map with 5-foot contour intervals; but used a <br />22 different measuring tool than the tool that planning staff used to measure slopes on the <br />23 property, also based on 5-foot contour intervals.` The Matthews Slope Map showed more <br />24 areas of the property included within the 47-lot proposal that contain slopes equal to or <br />4 Matthews used a 25-foot diameter (at scale) circle to measure slope and the planning staff used a 25-foot <br />(at scale) square, Record 466. <br />Page 10 <br />