Improved Support for Landsat Imagery in ArcGIS 10.1

Esri logoGIS Users Can Manipulate and Analyze Esri’s Landsat Imagery Services for Better Use with Geospatial Data

To assist scientists and land and resources managers in evaluating the earth’s changing landscape, Esri announced today that it has further improved support for Landsat imagery, including simplified workflows for ArcGIS 10.1 for Desktop and improvements in the World Landsat Services on ArcGIS Online. In addition, Esri and the Department of the Interior (DOI) worked closely to make all Landsat Global Land Survey (GLS) imagery, including the latest—GLS2010—available through dynamic, multispectral, multitemporal image services on ArcGIS Online.

“Technology barriers are coming down,” said Rachel Headley, PhD, Landsat project, United States Geological Survey (USGS) Earth Resources Observation and Science (EROS). “We are now enabling entirely new communities to share and enjoy the views of earth that Landsat has documented for more than four decades.”

Landsat 7, the current earth observation satellite, produces 30-meter-resolution, calibrated, multispectral imagery in 185 x 185-kilometer scenes. The imagery is free for use by everyone and has become a rich data resource for agriculture, forestry, natural resources exploration, and many other industries.

The existing Landsat image services were refined by adding the GLS 2010 dataset and improving the visual quality with radiometric enhancement. Ten services were added including the following:

  • A single service end point that combines 26 separate image services products
  • A service that returns tasseled cap transforms
  • A 15-meter panchromatic image
  • Services for better visualization such as a natural color combined with hillshading

“By combining Landsat imagery with a mashup of multiple data sources available through ArcGIS Online, such as bathymetric, world elevation services, and DeLorme datasets, as well as user-defined content, users can better understand the spatial relationship and interaction of ecosystems and urban development,” said Lawrie Jordan, Esri’s director of imagery. “ArcGIS allows people to analyze and use imagery for more than just an image backdrop to their GIS. It has become an integral part of their analysis of GIS data.”

Esri has also updated the easy-to-use web-based Landsat ChangeMatters viewer for visualizing, analyzing, and detecting change using these image services. For more information on Esri’s support for Landsat imagery, visit esri.com/landsat.

[Source: Esri press release]

Housing and Urbanization: A Socio-Spatial Analysis of Resettlement Projects in Hồ Chí Minh City

SIT Graduate Institute, Paper 1284, 4-1-2012

Michael J. Stumpf

“As Hồ Chí Minh City continues to undergo rapid urbanization, especially with the creation of a multitude of new urban zone developments on the periphery of the inner districts, the resettling of people has become common. Families who live within areas that are selected for urban upgrading or, as in other cases for the construction of new miniature cities, must face the realities of relocation. Many issues arise in the complicated process of resettling the displaced, due to complex land-use laws, bureaucratic dissonance, and lack of investment in actual resettlement housing. The authorities of Hồ Chí Minh City have faced palpable challenges in facilitating the many processes of resettlement, from persuading developers to invest in resettlement housing to establishing suitable compensation packages. Confusing legal labyrinths, delays in plan approval, and miscommunications between agencies, results in tangible affects on the highly vulnerable displaced families. Additionally, a serious disconnect arises between planners’ envisioned solution for resettlement housing and the real needs of the resettled, who are usually low-income workers. When the precise needs of displaced families and their prior sources of economic livelihood are disregarded, the general result is unsuitable design and the disordering of previously established socio-spatial networks. Additionally the displaced tend to be sent to occupy less advantageous space, as a result of gentrification, and are spatially repositioned in more excluded, disconnected marginal zones. Past and present resettlement procedures have faltered due especially to a lack of socio-spatial planning, which has resulted in undesirable threats to equitable metropolisation and rising potentials for urban fragmentation.”