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  • 1.  Extract non-obvious information from geospatial data - Regional operations and functions

    Employee
    Posted 04-25-2019 14:27

    Statistical analysis is helpful for data exploration and analytics. The information such as mean, median, min, max, range, standard deviation, quartiles etc. values are quite helpful to examine distribution of values and data errors, identify outliers, reclassification of data, summarize data and many more. These analysis helps extract additional information revealing characteristics/ patterns of region/zone which are helpful in spatial decision making.

    So, calculating statistical information of a defined boundary (~region/zone) is quite easier using Region Inspection/Region Statistics tool of MapInfo Pro Advanced. It summarizes the values of a raster within the region of vector dataset and appends the results to vector table. Various statistical attributes which can be derived using Region Inspection/Region Statistics tools are

    • Minimum
    • Maximum
    • Average
    • Median
    • Coefficient of variation
    • Range
    • Cell count
    • Standard deviation
    • Null cell count
    • Sum of cells
    • % Null cells
    • Mode
    • Lower Quartile
    • Upper Quartile
    • Inner Quartile Range

    In the example below, statistics have been calculated for the distribution of elevation values by parcels. Based on obtained statistics information for each parcel, these can be classified falling into high, medium and low range values. Stats suggests that most parcels are lying in lower elevation range values and hence chances of flood risk with slight rise in sea water could be higher. Such kind of information is useful for insurance companies underwriting risk and premium calculation for a parcel. Similar analysis could be extended for building footprint.

    There are various applications in which output derived from region statistics calculation tool can be used such as

    • Insurance companies would like to know lowest or highest elevation of building for better flood risk underwriting
    • Urban planner may want to know average green space per planning zone or unit
    • Police personnel may want to know high crime zones in neighborhood for better deployment of security
    • Hydrologist may want to know average elevation, slope and aspect per watershed
    • Real Estate agents would like to know sale amount range of parcels for focused client deals
    • Crop scientist may want to compute range of soil nitrogen content per paddy field

    So, what are you waiting for? Analytics tool is available for you to use and make decisions. Grab a copy of MapInfo Professional and start exploring. Happy Learning!



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    Dr Neena Priyanka
    Pitney Bowes Software India PVT. Ltd
    Noida
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  • 2.  RE: Extract non-obvious information from geospatial data - Regional operations and functions

    Posted 04-26-2019 09:48
    Better yet, just go download the National Flood Hazard Layer from FEMA, where data is already modeled and classified into the various flood zones insurance companies use.

    https://msc.fema.gov/portal/advanceSearch

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    Steve Wallace
    Florida Farm Bureau Insurance
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  • 3.  RE: Extract non-obvious information from geospatial data - Regional operations and functions

    Employee
    Posted 04-27-2019 11:53
    Hi Steve

    Thanks for sharing information about FEMA Flood Hazard layer. We at Pitney bowes do have Flood Risk data with us and are aware of various flood zones. The point I was trying to make here w.r.t. use of Regional Statistics tool is that we can calculate micro level elevation details using lidar, NED 1/9 or NED 1/3 resolution for parcels/building footprints. The information can be readily used to update Flood Certificate where as FEMA provides gross Base Flood Elevation (BFE) values which is not sufficient enough to get required values expected in Flood elevation certificate. 
    Also, the usage of Rater Statistics is not limited to Flood Risk assessment instead can be used broadly for any zonal value inspection.

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    Dr Neena Priyanka
    Pitney Bowes Software India PVT. Ltd
    Noida
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  • 4.  RE: Extract non-obvious information from geospatial data - Regional operations and functions

    Moderator
    Posted 06-07-2019 14:27
    I think this post in the data sandbox may be relevant to this discussion. Measure twice, cut once as they say.


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    Dave Andrews
    Pitney Bowes Inc
    Stamford CT
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