Latest Contributions by JuanYao

Hello Robert, Thank you very much for your quick response. Now I have a question about the ALOHA ArcMap import tools. I think that you are probably also familiar with this dispersion software. Actually I was using ALOHA for simulating the dispersion of a hypothetical chemical mixture release. I downloaded their ArcMap Import Tools from this link (ArcMap 10.0 version) http://response.restoration.noaa.gov/oil-and-chemical-spills/chemical-spills/resources/aloha-arcmap-import-tools.html and I successfully imported .pas files to the ArcMap. Howerver, after displaying the plume polygon on the map, I found that the centerline of the polygon is longer than it is supposed to be. For example, in ALOHA display page, one chemical plume can reach as far as 6.1 km (yellow area in Figure 1). Figure 1. threat zone displayed in ALOHA. Once this plot is imported into ArcMap, the centerline of the yellow area is 8.8 km (Figure 2) estimated by "measure" tool. Figure 2. Threat zone displayed in ArcMap I tried to test if the import tool work correctly or not, so I imported the xy coordinate table of the same plume to ArcMap from excel. It showed the same centerline length as it was in ALOHA (Figure 3) even without projection. Figure 3. Plume displayed based on xy coordinates I am wondering if there is anything wrong with this import tool, or because I made any incorrect operation. Your help and suggestion would be much appreciated. Best, Juan (pronunciation similar to Gen) ... View more

Thanks for your quick reply. Yes, I found these tools back. Thanks a lot! ... View more