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Teng Keng Vang

Teng Keng Vang

geospatial · data science · ecology

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    Using Conda in Power BI

    Update: Python 3.7.7 is no longer available in conda. I’ve confirmed that this works with Python 3.7.12 (the earliest version of Python 3.7.x installable from conda). The… Read more “Using Conda in Power BI”

    January 26, 2023February 15, 2023 by Vangtk

    Transforming Coordinates

    This is an update to this previous blog post. Ever since the announcement of rgdal retiring, I’ve been meaning to update the process of transforming or re-projecting… Read more “Transforming Coordinates”

    December 3, 2022January 25, 2023 by Vangtk

    ArcPy Outside of ArcMap/ArcPro

    One of the more problematic issues I’ve come across is accessing ArcPy outside of the bundled software that comes with an ArcGIS Pro installation. If you google… Read more “ArcPy Outside of ArcMap/ArcPro”

    August 24, 2022January 25, 2023 by Vangtk

    Extracting from Raster

    Perhaps the one question I’m asked the most is how to extract values from a raster using a series of points. Today, I answer that question. I’ll… Read more “Extracting from Raster”

    February 4, 2022January 25, 2023 by Vangtk

    Delineating a Stream Network

    For my masters research, I needed a fully delineated stream network map of the Great Miami River Watershed that included all first order streams. Because of this… Read more “Delineating a Stream Network”

    November 25, 2019January 25, 2023 by Vangtk

    Minimum Convex Polygon for Home Range Estimate

    One of the most surprising things for me is the search terms that lead people to my website. MCP is actually the top search term. So while… Read more “Minimum Convex Polygon for Home Range Estimate”

    November 12, 2018January 25, 2023 by Vangtk

    Mosaic, or merge, rasters in R

    Update Feb 5, 2022: The post showing you how to layer rasters on top of each other so that you can extract values is live. You can… Read more “Mosaic, or merge, rasters in R”

    November 12, 2018January 25, 2023 by Vangtk

    MCP, KDE, and LoCoH

    Three of the most popular methods of home range estimation right now are the minimum convex polygon (MCP), kernel density estimation (KDE), and local convex hull (LoCoH).… Read more “MCP, KDE, and LoCoH”

    August 23, 2017January 25, 2023 by Vangtk

    Local convex hull or LoCoH in R

    The local convex hull method of home range estimation is a relatively recent technique. It was developed in 2004 by Getz and Wilmers. You can read the… Read more “Local convex hull or LoCoH in R”

    August 18, 2017January 25, 2023 by Vangtk

    Transforming Coordinates from Lat Long to UTM

    Please note: rgdal is being deprecated at the end of 2023. See this blog post on r-spatial. Update: Updated post for transformation in R using sf is… Read more “Transforming Coordinates from Lat Long to UTM”

    August 15, 2017January 25, 2023 by Vangtk

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