Climate and Environment

Recent spring-like weather we have been experiencing here in Washington area feels good. There is a cherry blossom tree close to Rt 7  that is in bloom and looking so pretty, when other trees have lost their leaves (except, of course the evergreens).  Postponing icy air and slushy roads for some more time is not … More Climate and Environment

Urban Change in Gilbert, Arizona – Analysis and Results

Landsat imageries provide rich source of data for monitoring changes and for studies in various fields. According to USGS, nearly one-fifth of landsat data is used for monitoring land use / land cover change (LULC). Source: Landsat/USGS  I wanted to use Landsat imageries and remote sensing application to understand urban growth in Gilbert town, in … More Urban Change in Gilbert, Arizona – Analysis and Results

Urban Change in Gilbert, Arizona – A Remote Sensing Application

Gilbert town in Arizona lies to south east of Phoenix-Mesa metropolitan area. It covers an area of 67.96 square miles. The town has been growing very fast for past 15 years, as I explained in my last post on Urban Change in Gilbert – Landsat Data. In 2014, the estimated population was about 240,000 and … More Urban Change in Gilbert, Arizona – A Remote Sensing Application

Urban Change in Gilbert, Arizona – Landsat Data

For my projects for both GIS-295 and GIS-255 at NOVA, I decided to look into application of remote sensing and GIS for studying urban growth and producing web mapping on the topic. I chose Gilbert, Arizona because it has experienced rapid urban growth for some time. Metropolitan Statistical Area (MSA) is a concept defined by … More Urban Change in Gilbert, Arizona – Landsat Data

Measuring Economic Health from Space – Data Collection Processes and Limitations, Part 2

Can remote sensing data be used to help determine policy measures to alleviate poverty or impact economic and social changes? Typically socioeconomic data from the census is supplemented with sampled detailed household surveys. These forms of data collection tend to be both labor and time intensive, expensive and in some places hard to obtain because … More Measuring Economic Health from Space – Data Collection Processes and Limitations, Part 2

Locations Do Matter

Location, location, location is an often heard entrepreneurial phrase. Why the emphasis? Although the phrase is attributed to Lord Harold Samuel, a real estate tycoon in Britain, its usage has been recorded as early as 1926 in an real estate ad. I wanted to see the how distribution of businesses related to place of living … More Locations Do Matter

A Guest Lecture

Most of the cities and counties in US, including those in Northern Virginia, have GIS departments to keep track of data, help analyze and provide various services, including mapping products. Greg Bacon, a GIS analyst from Fairfax County’s GIS & Mapping Services was the guest speaker in the GIS 295 Web Mapping class on November … More A Guest Lecture

Time, Space and Urban Land use – Data Collection Processes and Limitations, Part 1

Urban growth is a reflection of dynamic nature of the economy. The word urban has different connotations for different countries and within a country. Its meaning has sometimes been redefined to reflect periodic reclassification. According to United Nations, urban growth has been defined has relative or absolute increase in urban population, while urbanization is the … More Time, Space and Urban Land use – Data Collection Processes and Limitations, Part 1