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   Joseph Elfelt (mappingsupport@m.ai6yr.org)'s status on Tuesday, 15-Sep-2026 04:50:50 JST Joseph Elfelt

   When California gets a major amount of rain this winter, the excess water may run over the surface in places where water does not usually run. Here is an idea that might help property owners recognize locations where water might run over the surface of the land during an exceptional rainy season.

   Ask your city/county if they can publish an online map similar to this one for Thousand Oaks. This map shows 2 foot contour lines using data hosted on the city’s GIS server. If you do not know how to read contour lines then just do a search. There are lots of videos and explainers.

   Maybe there is a subtle ‘v’ in the contour line data on property that is slightly higher than your property. Water may collect in the ‘v’ and then head in your direction. Might be a good idea to have a plan to divert running water away from your buildings.

   Open GISsurfer map:
   https://mappingsupport.com/p2/gissurfer.php?center=34.178539,-118.857880&zoom=18&basemap=All_white_basemap&overlay=TO_streets_Low_Level,TO_streets_mid_Level,TO_streets_high_Level,2ft_contours,TO_parcels&data=https://mappingsupport.com/p2/special_maps/misc_maps/thousand_oaks_calif.txt
   #CAwx #ThousandOaks #ClimateEmergency