Harish Sangireddy The University of Texas at Austin.

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Presentation transcript:

Harish Sangireddy The University of Texas at Austin

Outline  Organizing data for capturing flood events.  Publishing map services to ArcGIS online.  Accessing time series data in ArcMap.

Organizing data for Flood events Create an observation datacart to organize the data required for flood analysis. The observation time series datacart could be about Area of study Precipitation Stream flow Gage height Radar images and many more data sets

Area of study The CAPCOG counties have been chosen as the area of study for analyzing flash flood conditions during the Tropical Storm Hermine that occurred in September 2010.

Precipitation data To capture precipitation data for the CAPCOG region, hourly and daily NEXRAD data was used. The daily and hourly NEXRAD data was obtained from The University of Texas at Arlington, where the NEXRAD data is received from NWS and served as a Web service in WaterML format.

Stream flow data The stream flow is obtained from the USGS stations. USGS exposes a rest service that returns a WaterML file for a given station and parameter. These are instantaneous values measured at every 5 minute intervals.

All other data sets that we think are necessary for floods

Publishing data to ArcGIS Online Create your flood map. Use the Arc GIS map service publishing tool to publish map service on your Arc Server. Open and login using your ArcGIS global account.

Preparing data on ArcGIS Online

Accessing maps on ArcGIS Explorer Online

The time series response ocation=WFO_EWX_Hourly_MPE:310165&variable=NWS- WGRFC:MPE&startDate= &endDate= &authToken=

Accessing data from ArcMap Lets have a live demo on how we can access data within arc view by making REST calls and reading data on the fly.

Time series Plot

Conclusions Making and publishing maps with ArcGIS is a fast process. We can bring together a variety of data to make better maps increasing our understanding about floods and its spatial variability. A tool box for various flood analyses methods can be constructed inside ArcMap. Web services help us to read data directly from servers located at different locations. We can make various analyses by accessing the data on the fly without downloading the actual data. These web services can be used to create virtual datasets inside Arcmap by using python. The analysis can be extended by using Rpy a python module for “R” and we can build various mathematical models for dealing with Flood analysis.

Being brave does not help!