Posts tagged ALOHA
Without knowing that Bharath is working on integrating ALOHA Plume models into Depiction, one of our users contacted the ALOHA developers and asked them how to export a model as a shapefile. This would allow him (and other users) to import that file into Depiction. The ALOHA team was glad to help, and gave these instructions:
To make your shapefile:
1. Run the scenario and display the threat zone in ALOHA.
2. Open MARPLOT and click on the lat/long where the chemical was released.
3. From the ALOHA Sharing menu in MARPLOT, choose Set Source Point. The ALOHA threat zone is now displayed in MARPLOT with the source point of the release at the lat/long location that you clicked on.
4. In MARPLOT, select the ALOHA threat zone.
5. In MARPLOT File menu, choose Export Overlay Objects.
6. On the Export dialog, choose the Shapefile format. Note that if you have selected both polygon objects (the threat zones) and point objects (the ALOHA source point and/or the ALOHA threat point) you will need to perform separate exports for each type of object.
This assumes that the user is already familiar with ALOHA and MARPLOT, and considering the number of requests we have gotten for this information, many Depiction users are.
The user was also kind enough to send a depiction he then created using this method. I have altered it a bit (changed colors to match the descriptions of red, orange and yellow zones and the icons to our plume icon) for posting a clip here.
I hope this will make Depiction all the more useful for our Emergency Management users.
The Depiction platform was created with the intention of allowing domain experts to integrate simulation models into custom elements to enable access of state-of-the-art simulations to the everyday user. The models in our initial retail version – such as flooding, runoff, plume distribution, evacuation routing, and signal propagation – demonstrate the power of simulations in visualizing ‘what if’ scenarios in the geographic domain.
The integration of an industry-standard simulation models, we believe, will enhance the usefulness of our modest tool. To that end, we have been eyeing programs such as ALOHA. An industry standard for modeling dispersion of hazardous chemicals, the ALOHA program was developed jointly by the National Oceanic and Atmospheric Administration (NOAA) and the Environmental Protection Agency (EPA). Available freely, this program has over 50,000 users in government and industry, and the accompanying CAMEO suite of software has had over 250,000 downloads since 2001.
A growing number of Depiction users have been requesting integration of ALOHA plume outputs with Depiction. We listened and now are working toward that… More >