GIS Wind Analysis

in this demonstration I'm going to show you how to perform a wind analysis on some contours and building data I am using a tool called wind ninja this tool is available at WWF our lab org and is created by the United States Department of Agriculture and the US Forestry Service this product was created for calculating wind patterns to use in wildfire analysis the tool is not built for urban wind analysis so its accuracy in urban environments is only approximate and will be used for demonstration purposes only for this demo I will use a raster surface as well as some 3d multipatch building data that I have downloaded in order to run a wind analysis we need to create a raster surface that incorporates building height into the surface to do this we need to create a model first I will take my 3d multipatch building tools and convert them into raster data using the multi patch to raster geoprocessing tool you I am keeping my output cells is low here in order to improve the data resolution next I need to run a raster calculator operation you here I will create a conditional statement that creates an empty boundary around my building roster that I can later attached to my terrain you next I need to take my output roster and my terrain roster and combine them by using the plus tool you now I take the output from the plus tool and place the data back into a raster calculator creating another conditional statement to once again create a boundary for my data the reason for these conditional statements is due to the fact that wind ninja requires a rectangular raster input if the input is not rectangular then we will receive an error during the wind calculation finally I need to ensure that my output raster from the raster calculator is in IMG or imagined format as this is the format that wind ninja can read you once my model is built I can run my model and then add the output layer to my map document to view the output you I will now take this output and bring it into a ninja when ninja has many configurable settings and this demonstration only shows you a simple output that can be created I recommend that you read the tutorials included with wind inja to fully understand the project first I will choose that my solver will only use a conservation of mass next I need to bring in my surface as an input this is the IMG file that we created in arcmap next we need weather information I will download weather data through the app by enabling weather model initialization and selecting the appropriate data source you finally I will select a shape file output for my data now I can run the analysis with the solve button depending on the configuration of your data this could take anywhere from a few seconds to a few hours when the model is solved we can take the output path and add the data into arcmap you by looking at the attribute table we can see that each point has a wind direction and speed attached to it we can now visualize this information in arcmap or bring the data into city engine or arcgis pro for 3d visualization of both direction and speed you this concludes the wind analysis demonstration

Channel: Esri Canada Higher Education & Research

Views: 6,999

Rating: 4.8823528 out of 5

Keywords: esri canada, wind ninja, windninja, gis

Id: 6u6kd2XVxT4

Length: 7min 15sec (435 seconds)

Published: Fri Oct 27 2017