Dinesh Shrestha

Remote Sensing Scientist at KBR Inc. the contractor to the United States Geological Survey (USGS).

The New Normal: Text Analytics and Location Intelligence in ArcGIS

1.    Introduction to AI Machine Learning, and Deep Learning in ArcGIS Artificial Intelligence is the bigger idea of achieving the human level of intelligence, Machine Learning is a subset of Artificial Intelligence that deals with big data –deriving rules and extracting patterns; Deep Learning is a kind of Machine Learning that uses a specific technique …

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Application of Remote Sensing in Agriculture

Introduction Increasing interest in Remote Sensing and advancement technologies such as ArcGIS, QGIS, ENVI, ERDAS, and others have open gateways to various researches—agriculture being one of them. The easy viability of hyperspectral images (thanks to USGS EROS Center) and the enthusiasm of the scientists in using their expertise interpreting and analyzing these images to produce …

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What is Kriging? What is Ordinary Kriging? How does it work?

Kriging is an advanced geostatistical procedure that generates an estimated surface from a scattered set of points with z-values. Using geostatistical techniques, you can create surfaces incorporating the statistical properties of the measured data. Kriging is based on statistics. These techniques produce not only prediction surfaces but also error or uncertainty surfaces, giving you an …

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What is Inverse Distance Weighting (IDW)? What are its importance in Spatial Interpolation? How does it work?

The IDW (Inverse Distance Weighted) tool uses a method of interpolation that estimates cell values by averaging the values of sample data points in the neighborhood of each processing cell. The closer a point is to the center of the cell being estimated, the more influence, or weight, it has in the averaging process. It …

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What is Trend Surface Analysis? What are the types of Trend Surface Analysis? How does it work?

Trend Surface Analysis is a global polynomial interpolation method that fits a smooth surface defined by a mathematical function (a polynomial) to the input sample points. It changes gradually and captures coarse-scale patterns in the data. This technique is mostly used to produce a smooth surface that represents a gradual tends in the surface over …

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What is Spatial Interpolation? What are the different methods of Interpolation used in GIS?

Spatial Interpolation is a method to estimate a value of unknown pixels based on measurements/values from known pixels in close proximity or within a range of unknown pixels. Based on Tobler’s First Law of Geography–that points close together in space are more likely to have similar values than points that are far apart, this method …

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Applications of GIS in Agriculture

Increasing interest in Remote Sensing and advancement in the GIS technology has open gateways to various researches—agriculture being one of them. The easy viability of hyperspectral images (thanks to USGS EROS Center) and the enthusiasm of the scientists in using their expertise interpreting and analyzing these images to produce robust, sensible, and understandable products has …

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What are the differences between ArcGIS and ArcGIS Pro?

ArcMap ArcGIS Pro Projects are saved in .mxd format Projects are saved in .aprx format It has 3 different applications: ArcMap, Arc catalog, and Arc Scene All three applications are unified and can be used interchangeably It has an application view It is a ribbon-based application ArcMap is document-based–meaning it has only one map and …

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What is Geoprocessing? What are the useful geoprocessing tools?

Definition ESRI defines geoprocessing as a framework and set of tools for processing geographic related data. In GIS, there are different geoprocessing tools and techniques to perform spatial analysis or manage GIS data in an automated way. It is a very important tool in ArcGIS software and plays a fundamental role in spatial analysis. Geoprocessing …

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