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How to calculate NDWI using ArcGis

How to calculate NDWI using ArcGis

How to calculate NDWI using ArcGis Normalized Difference Water Index (NDWI) The Normalized Difference Water Index (NDWI) is a new method that has been developed to delineate open water features and enhance their presence in remotely-sensed digital imagery. The NDWI makes use of reflected near-infrared radiation and visible green light to enhance the presence of such features while eliminating the ...

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How to build 3D Geology model with GeoModeller – 1 hour webinar

How to build 3D Geology model with GeoModeller – 1 hour webinar

How to build 3D Geology model with GeoModeller – 1 hour webinar This webinar lasts about 1 hour and show you theory (18 minutes) and process how to build 3D geological model in GeoModeller. I am using this software for more the 5 years, mostly as first step in building complex hydrogeological model that are latter translated to Groundwater Vistas ...

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GIS in Public Safety: Seattle Police Department

GIS in Public Safety: Seattle Police Department

GIS in Public Safety: Seattle Police Department GIS is the foundation of Seattle PD’s information system. Its biggest test is the Torchlight Parade, which is the highlight of the Seafair celebration each summer. Learn more, here: http://ift.tt/2xO99Cr

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Introducing Core GIS Toolkit: The Core Vector GIS Toolkit

Introducing Core GIS Toolkit: The Core Vector GIS Toolkit (1)

Introducing Core GIS Toolkit: The Core Vector GIS Toolkit GIS software provides a sophisticated tool set for solving problems and answering questions. However, most of the tools, and especially the most powerful, are rather abstract. Learning how these tools work is a very important part of learning GIS and geospatial analysis. We are going to be talking about what I ...

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Using FOSS4G to solve Big Data challenges at the NREL

Using FOSS4G to solve Big Data challenges at the NREL

Using FOSS4G to solve Big Data challenges at the NREL Large spatio-temporal data sets are a common aspect of the geospatial work carried out at the National Renewable Energy Laboratory (NREL) in Golder Colorado USA. Currently, a stack of FOSS/FOSS4G tools is being used to perform analyses on such data sets. This presentation will explain how a combination of Python ...

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Clean polygon gap sliver multipart and polygon in polygon in ArcGIS

clean polygon gap sliver multipart and polygon in polygon in ArcGIS

Clean polygon gap sliver multipart and polygon in polygon in ArcGIS Utilize the CLEAN Command of ArcInfo to clean the geometry errors of polygon in ArcGIS and ArcMap The known errors that can be fixed : 1. Polygon under polygon condition (can make area calculation wrong) 2. Multipart condition (usually resulted from dissolve operation) 3. Polygon gap

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