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About socalgovgis - Michael Carson

Michael Carson, GIS Manager (retired) for the City of Burbank and President of Southern California Government GIS User Group. Currently teaching GIS at College of the Canyons in Santa Clarita.

Charging for Landsat Data?

Landsat data has been free and open since 2008.  In 2017 there was a request from the Department of the Interior that the USGS consider the possibility of fee recovery for Landsat data.  The Landsat Advisory Committee (LAG) took up the task to review it.  Their analysis focused on three cost-sharing approaches: charging for traditional data, charging for value added products and services, and private-public partnership (P3) structures.

The LAG has finally released their findings in a report, “Evaluation of a Range of Landsat Data Cost Sharing Models”.  Spoiler alert: the committee did not recommend charging for Landsat 8 and 9 data stating, “The LAG believes that charging a fee for Landsat data will generate little net revenue.”  They note that doing so would “result in negative economic impacts to the U.S. commercial remote sensing satellite and value-added industries.” Laws and regulations would need to be changed in order charge for data and that the revenue gained would not be worth the economic, legal, societal or political costs.

For more info and to view the report click here.

The Last Commercial Orange Grove

Back in the 1920’s agriculture played a dominant role in the San Fernando Valley region.  At one point 75,000 acres of Valley land between towns and subdivisions was used for farming, which included 750,000 citrus trees.

By the 1990’s the Valley’s working citrus industry dwindled to just one, the Bothwell Ranch.  It is located in Tarzana at the corner of Oakdale Ave and Collier St, just a half mile south of Ventura Blvd.

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Now it is up for sale.  The asking price is $13.9 million.  Collier International and Coldwell Banker is billing the property as “an incredibly rare infill development opportunity”.  Marketing materials include a site plan that would split the 14 acres into 26 half acre lots for development into 2-4 million dollar single family homes.  How sad.  Click below to read the article about it.

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The good news is that not too far away is the last historic orange grove of San Fernando Valley owned and protected by CSUN.  The area includes 400 orange trees, a pond, bistro, and observatory.  The orange grove has thousands of fresh, free oranges waiting to be picked by you!  Anyone from anywhere can pick oranges at any time from the orange grove.  Have fun, and make sure to feed the red-eared slider turtles in the pond too!

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Fireworks 2019!

July 4th is just around the corner, which means there will be fireworks again!

Use the app to view cities in LA, Orange, Ventura, Riverside, and San Bernardino County that allow the sale and discharge of fireworks.  Included are days and times when fireworks will be sold and when you can light them up, as well as links to city websites and telephone numbers.  Data was collected from municipal codes, websites, and/or contacting each city.  Some cities allow sales to start today AND allow you to discharge them today as well!  Check it out!

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Calculating Slope Using Python

The standard slope tool in ArcGIS Desktop only examines a 3×3 cell neighborhood (and does not include the center cell) to determine slope for each cell.  However, using Python you can create a method for calculating slope along a flow direction grid specific to your needs.  Check out this article about using Python to calculate a fire “flow direction” based on a DEM and fire lines.

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