http://modelwiki.northfloridatpo.com/index.php?action=history&feed=atom&title=3.3_Short_Distance_Impedance_Generation 3.3 Short Distance Impedance Generation - Revision history 2026-04-20T20:35:28Z Revision history for this page on the wiki MediaWiki 1.27.1 http://modelwiki.northfloridatpo.com/index.php?title=3.3_Short_Distance_Impedance_Generation&diff=400&oldid=prev Bstabler at 19:46, 25 August 2020 2020-08-25T19:46:59Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;' lang='en'> <td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 19:46, 25 August 2020</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3.0 Model Design]]</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3.0 Model Design]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Once the all-streets network preparation is complete, it can be used to generate short distance impedances.&#160; These short distance impedances are typically used in two ways:&#160; they are input to the <del class="diffchange diffchange-inline">parcel</del>-level data preparation in order to provide more accurate measures of accessibilities to employment, households, schools and transit, and they can also be used directly by the DaySim choice models, in conjunction with more typical TAZ-based impedances.&#160; There is a multistep process for generating the short distance impedances.&#160; First, a list of network node pairs is generated consisting of all node pairs that are within 3 miles (Euclidean, based on node coordinates) of each other is generated using a utility program.&#160; Network shortest path distances are then calculated for each of the node pairs in the list using a roadway network pathbuilding tool called DTALite.&#160; DTALite is used because it is very fast, although other pathbuilding tools may also be used.&#160; The result is a list of node pairs with the all streets network shortest path distances between them that is an input to the <del class="diffchange diffchange-inline">parcel </del>buffering process that is described in subsequent sections.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Once the all-streets network preparation is complete, it can be used to generate short distance impedances.&#160; These short distance impedances are typically used in two ways:&#160; they are input to the <ins class="diffchange diffchange-inline">microzone</ins>-level data preparation in order to provide more accurate measures of accessibilities to employment, households, schools and transit, and they can also be used directly by the DaySim choice models, in conjunction with more typical TAZ-based impedances.&#160; There is a multistep process for generating the short distance impedances.&#160; First, a list of network node pairs is generated consisting of all node pairs that are within 3 miles (Euclidean, based on node coordinates) of each other is generated using a utility program.&#160; Network shortest path distances are then calculated for each of the node pairs in the list using a roadway network pathbuilding tool called DTALite.&#160; DTALite is used because it is very fast, although other pathbuilding tools may also be used.&#160; The result is a list of node pairs with the all streets network shortest path distances between them that is an input to the <ins class="diffchange diffchange-inline">microzone </ins>buffering process that is described in subsequent sections.</div></td></tr> </table> Bstabler http://modelwiki.northfloridatpo.com/index.php?title=3.3_Short_Distance_Impedance_Generation&diff=140&oldid=prev Gwineman at 20:38, 17 October 2016 2016-10-17T20:38:10Z <p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;' lang='en'> <td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 20:38, 17 October 2016</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3.0 Model Design]]</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3.0 Model Design]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Once the all-streets network preparation is complete, it can be used to generate short distance impedances.&#160; These short distance impedances are typically used in two ways:&#160; they are input to the parcel-level data preparation in order to provide more accurate measures of accessibilities to employment, households, schools and transit, and they can also be used directly by the DaySim choice models, in conjunction with more typical TAZ-based impedances.&#160; There is a multistep process for generating the short distance impedances.&#160; First, a list of network node pairs is generated consisting of all node pairs that are within 3 miles (Euclidean, based on node coordinates) of each other is generated using a utility program.&#160; Network shortest path distances are then calculated for each of the node pairs in the list using a roadway network pathbuilding tool called DTALite.&#160; DTALite is used because it is very fast, although other pathbuilding tools may also be used.&#160; The result is a list of node pairs with the all streets network shortest path distances between them that is an input to the parcel buffering process that is described in subsequent sections.</ins></div></td></tr> </table> Gwineman http://modelwiki.northfloridatpo.com/index.php?title=3.3_Short_Distance_Impedance_Generation&diff=117&oldid=prev Gwineman: Created page with "Category:3.0 Model Design" 2016-10-17T20:16:15Z <p>Created page with &quot;<a href="/Category:3.0_Model_Design" title="Category:3.0 Model Design">Category:3.0 Model Design</a>&quot;</p> <p><b>New page</b></p><div>[[Category:3.0 Model Design]]</div> Gwineman