Redrawing Austin Police Department Sector Boundaries

Presented by Sara Davis

Transcript

1. Redrawing Austin Police Department Sector Boundaries Practical Application of the Districting Extension for ArcGIS
2. Why  Redistrict?   •  Current  boundaries  since  2011   •  Popula:on  growth  (up  6.5%  in  3   years)   •  Current  Patrol  staffing  alloca:ons   •  Crime  Sta:s:cs    
3. Factors  to  Consider   •  Call  Volume  per  Sector  (#  of  911   calls)   •  Number  of  Part  1  Crimes   •  Number  of  Crashes    
4. Current  Sector  Sta,s,cs   SECTOR   Part  1   %   Crashes   %   Calls   %   Total   %   BAKER   1,913   7.9%   1,389   10.6%   53,096   9.8%   56,398   9.7%   GEORGE   1,201   5.0%   674   5.1%   57,337   10.5%   59,212   10.2%   IDA   2,629   10.9%   1,066   8.1%   50,906   9.4%   54,601   9.4%   ADAM   3,638   15.0%   2,253   17.1%   72,874   13.4%   78,765   13.5%   EDWAR D   3,686   15.2%   1,596   12.1%   68,248   12.5%   73,530   12.6%   CHARLIE   2,186   9.0%   1,329   10.1%   57,741   10.6%   61,256   10.5%   HENRY   2,453   10.1%   1,066   8.1%   49,451   9.1%   52,970   9.1%   APT   19   0.1%   23   0.2%   45   0.0%   87   0.0%   DAVID   3,073   12.7%   2,177   16.6%   68,636   12.6%   73,886   12.7%   FRANK   3,420   14.1%   1,579   12.0%   65,701   12.1%   70,700   12.2%   TOTAL   24,218   100%   13,152   100%   544,035   100%   581,405   100%  
5. Current   Sector   Boundaries  
6. Current   Sector   Boundaries  
7. First   Proposed   Boundaries  
8. Final   Proposed   Boundaries  
9. Proposed  Sector  Sta:s:cs   SECTOR   Part  1   %   Crashes   %   Calls   %   Total   %   BAKER   2,558   10.7%   1,950   15.0%   67,910   12.6%   72,418   12.6%   GEORGE   1,198   5.0%   643   5.0%   57,047   10.6%   58,888   10.2%   IDA   2,817   11.8%   1,178   9.1%   56,052   10.4%   60,047   10.4%   ADAM   2,841   11.9%   1,766   13.6%   56,944   10.5%   61,551   10.7%   EDWAR D   3,588   15.0%   1,497   11.5%   66,472   12.3%   71,557   12.4%   CHARLIE   2,129   8.9%   1,175   9.1%   53,963   10.0%   57,267   9.9%   HENRY   2,673   11.2%   1,184   9.1%   53,129   9.8%   56,986   9.9%   APT   20   0.1%   69   0.5%   703   0.1%   792   0.1%   DAVID   2,982   12.5%   2,079   16.0%   66,951   12.4%   72,012   12.5%   FRANK   3,137   13.1%   1,422   11.0%   60,592   11.2%   65,151   11.3%   TOTAL   23,943   100%   12,963   100%   539,763   100%   576,669   100%  
10. Comparison  of  Sector  Areas   SECTOR   Acres   Miles   %   BAKER   16566.96   25.89   9.5%   GEORGE   1374.905   2.15   0.8%   IDA   7469.305   11.67   4.3%   ADAM   39278.64   61.37   22.4%   EDWARD   18750.82   29.3   10.7%   CHARLIE   20375.24   31.84   11.6%   HENRY   13434.65   20.99   7.7%   AIRPORT   4169.945   6.52   2.4%   DAVID   26503.17   41.41   15.1%   FRANK   27127.12   42.39   15.5%   TOTAL   175050.8   273.53   100.0%   Current   Proposed   SECTOR   Acres   Miles   %   Change   BAKER   22645.01   35.38   12.9%   Gain   GEORGE   1374.59   2.15   0.8%   IDA   7504.21   11.73   4.3%   Gain   ADAM   34131.92   53.33   19.5%   Loss   EDWARD   15664.14   24.48   9.0%   Loss   CHARLIE   22464.20   35.1   12.8%   Gain   HENRY   14147.93   22.11   8.1%   Gain   AIRPORT   4229.09   6.61   2.4%   DAVID   30259.12   47.28   17.3%   Gain   FRANK   22592.70   35.3   12.9%   Loss   TOTAL   175012.90   273.47   100.0%  
11. Hotshot  Calls   SECTOR   COUNT   %   ADAM   2686   10.22%   APT   1686   6.42%   BAKER   1610   6.13%   CHARLIE   3059   11.64%   DAVID   2795   10.64%   EDWARD   3663   13.94%   FRANK   3417   13.01%   GEORGE   1755   6.68%   HENRY   2837   10.80%   IDA   2670   10.16%   OUTSIDE   93   0.35%   TOTAL   26271       SECTOR   COUNT   %   ADAM   2158   8.21%   -­‐2.01%   APT   1691   6.44%   +0.02%   BAKER   2202   8.38%   +2.25%   CHARLIE   2868   10.92%   -­‐0.72%   DAVID   2762   10.51%   -­‐0.13%   EDWARD   3586   13.65%   -­‐0.29%   FRANK   3189   12.14%   -­‐0.87%   GEORGE   1757   6.69%   +0.01%   HENRY   3088   11.75%   +0.95%   IDA   2857   10.88%   +0.72%   OUTSIDE   113   0.43%   +0.08   TOTAL   26271       2013 Hotshot Calls Current Sectors 2013 Hotshot Calls Proposed Sectors Difference   -­‐Decreases  in  five  sectors   -­‐Increase  in  one  sector,  small  increases  in  three  sectors   -­‐Significant  increase  in  Baker,  but  it  previously  had  the  lowest  of  the  nine  sectors,  and  it’s   s:ll  lower  than  six  other  sectors  
12. Distric:ng  for  ArcGIS  Add-­‐on   •  Who  could  use  this?   – Elec:ons   •  Vo:ng  precincts   •  State  &  US  Representa:ve  districts   – County/Local  Government  for  Census  prep   – Public  Safety  districts   •  Police   •  Fire/EMS   – Maintenance/Delivery  areas  
13. Distric:ng  for  ArcGIS  Add-­‐on   •  FREE  download  available  from  ESRI  (including   for  earlier  versions  of  ArcGIS  10.x)   •  Open  ArcMap   •  Ac:vate  the  Add-­‐on  in  the  Extensions  dialog   to  access  the  toolbar  
14. What  is  a  Plan?   •  Workspace  and  Plan   –  Workspace  :  Geodatabase   –  Plan  :  Project  (.mxd)   •  Workspace  can  contain  mul:ple  Plans   •  Source  Data   –  Separate   •  Polygons  (shapefiles,  feature  classes,  coverage)   •  Ajribute  tables  with  common  ID  field;  NO  DUPLICATES   –  Single   •  Polygons  with  ajributes  included  
15. Crea:ng  a  Plan  
16. Crea:ng  a  Plan  
17. Crea:ng  a  Plan   •  Assign  Source  Data   –  Geography  keyfield   •  (must  be  a  unique  ID)   •  Ajribute  Data  Fields   –  Universe  field   –  Op:mal-­‐value  field  
18. Crea:ng  a  Plan   Set  number  of  Districts   Op,mal  Target  Value  
19. Crea:ng  a  Plan   •  Fields  for  Sta:s:cs   Table   –  Sum/Percent   –  Other  variables  to   consider  
20. Edi:ng  Your  Plan  
21. Edi:ng  Your  Plan   Can  change  District  names  in  the   Symbology  tab  outside  of  edi:ng  session  
22. Edi:ng  Your  Plan   Select  your  polygons   Right-­‐click  to  Assign  Selec,on  
23. Edi:ng  Your  Plan   Oops,  I  missed  one!  
24. Edi:ng  Your  Plan  
25. Once  You’ve  Finished   •  Export  plan  (ASCII  text  for  backup)   –  Useful  if  you  have  to  edit  the  plan  again  and  want  to   compare  the  original  to  current  edits   –  Plan  workspace  can  hold  mul:ple  plans   •  Export  to  Shapefile   •  Publish  to  AGOL  as  a  Layer  Package   •  Generate  Report  or  Layout   –  Report  is  a  text  file  of  sta:s:cs   –  Layout  adds  sta:s:cs  chart  and  table  to  generic  layout  
26. Poten:al  Roadblocks   •  Do  not  save  as  .mxd;  open  Plan  through  the   Distric:ng  toolbar   •  Can’t  change  District  pull-­‐down  while  block  is   selected   •  Plan  does  not  save  addi:onal  layers  added   (base  maps,  reference  data)   •  Source  Data  keyfields  need  to  be  same   datatype  and  unique  
27. Final  Tips   •  Tutorial  PDF  available  on  download  page   •  ESRI  support  available   – 1  advisor  but  she’s  very  responsive   •  distric:ng@esri.com,  subject:  Distric:ng  for  ArcGIS   Sara.davis@aus:ntexas.gov  (512)974-­‐5496   Ron.mackay@aus:ntexas.gov  (512)974-­‐5022