ArcGIS Desktop

ArcGIS Vs QGIS: Which Is Better For Biologists?

ArcGIS Vs QGIS: Which Is Better For Biologists?

When selecting GIS software, there are two main choices for biologists. These are the commercial package ArcGIS and the open-source, freely available package QGIS. This video provides a brief comparison of some of the key benefits and limitations of these two alternatives, and provides advice on which is best for biologists. This video is presented by Dr Colin D. MacLeod, ...

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ArcGIS Python Field Calculation Basics

ArcGIS Python Field Calculation Basics

Using the ArcGIS field calculator to make Python script calculations: pass a field value to a Python function which returns a modified field value. Basic Python numeric operators. Using % or mod operator to return major contours.

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Basic Raster Processing using Python in ArcGIS

Basic Raster Processing using Python in ArcGIS

In this session we create test integer and floating point rasters and query using the Con, SetNull,IsNull geoprocessing tools. We also use a cursor to access the raster attribute table and convert high elevation pixels to points. We also query for the total area above a threshold elevation.

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ArcGIS 10.2: Drainage Density Map

ArcGIS 10.2: Drainage Density Map

Visualizing drainage density on a map can help better inform clients or make decisions. Such analysis can be integrated into morphometric analysis, crop suitability model, and the likes. I hope you enjoy it.

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How to calculate NDVI with ArcMap 10.1

How to calculate NDVI with ArcMap 10.1

In this video I use ArcMap 10.1 with a 4 band Aerial Photo (RGBiR) to calculate the Normalized Difference Vegetation Index (NDVI), a graphical indicator that can be used to analyze remote sensing measurements to assess whether the target being observed contains live green vegetation or not. I use Spatial Analyst extension along with Raster Calculator in the Map Algebra ...

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Let’s Play-ArcGIS 10.2…ArcMap and Geoprocessing

Let’s Play-ArcGIS 10.2…ArcMap and Geoprocessing

ArcGIS 10.2 can address 64-bit memory space which means not only can it use far more of your available RAM but this new change also allows ArcGIS 10.2 to use all the cores you have available on your CPU. I have 8 cores on my workstation and we are going to try putting all of them to work on a ...

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Python Toolboxes in ArcGIS

Python Toolboxes in ArcGIS

A Python toolbox is a python script that uses classes. It looks very similar to arcgis custom script tools. We start with python classes, then learn about argis python toolbox basics, working with parameters, the execute class, validating parameters, and interacting among parameters.

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