Extracting MORE Features from Map Services

Posted on March 28, 2018 by socalgovgis - Michael Carson

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Back in August 2015 I posted information about how you can extract features from a map service. Since then, I have had many contact me about modifying the code so it can extract features beyond the record limit set in the map service. So today I decided to work on one that does!

To test the script, I headed over to the map services provided by the State of California GIS. Specifically, the one for wildfires:

http://services.gis.ca.gov/arcgis/rest/services/Environment/Wildfires/MapServer

When you scroll down a quick look will reveal that there is a maximum record count of 1000:

extractpt2-1

Continue reading →

California Releases “EQ Zapp”

Posted on March 27, 2018 by socalgovgis - Michael Carson

The California Earthquake Hazards Zone Application (“EQ Zapp”) is an online map that allows anyone with a computer, tablet, or smartphone to conveniently check whether a property is in an earthquake hazard zone. Earthquake hazard zones include fault rupture areas, liquefaction areas, and earthquake induced landslides. Check it out!

USGS Water Resources and Land Change Information

Posted on March 21, 2018 by socalgovgis - Michael Carson

The USGS Library provides reference services and instructional sessions to library users on finding print, digital, and online library materials. They are offering two webinars.

The first will focus on how to find and use information sources and products related to water use, surface water, groundwater, water quality, floods, droughts, and hurricanes (data, databases, publications, maps, and field and laboratory methods). Click here for more info and to register.

The second will focus on how to find and use information sources and products related to long-term and short-term land changes from natural-hazard events, land-use change, and example reference inquiries related to finding current and historical land information. Click here for more info and to register.

Both webinars will also cover education tools available from the USGS and other geoscience stakeholders.

New California Mapping

Posted on March 9, 2018 by socalgovgis - Michael Carson

Bella Terra Publishing. California, Hawaii lighthouses: illustrated map & guide, includes Lake Havasu & Lake Tahoe. 1 map, scale 1:1,550,000. Rhinebeck, NY: Bella Terra Publishing, pub. 2016. ISBN: 9781888216400

Benchmark Maps (Firm). California road & recreation atlas. 1 atlas (141 pages), scales differ. Santa Barbara, Calif.: Benchmark Maps, pub, 2017. ISBN: 9780929591490

Carapella, Aaron. Tribal nations of California. 1 map, scale not given. Warner, Okla.: Tribal Nations Maps, pub. 2017.

Farkov, Emanouil. That’s amazing!: Huell Howser visits California’s landmarks. 1 map, scale not given. Los Angeles: Automobile Club of Southern California, pub. 2016.

U.S. Bureau of Land Management, El Centro Field Office. BLM routes of travel for eastern Imperial County, California. 1 map, scale ca. 1:125,000. El Centro, Calif.: U.S. Bureau of Land Management, pub. 2017.

U.S. Forest Service, Pacific Southwest Region. Six Rivers National Forest, California. 1 map, scale ca. 1:126,720. [Vallejo, Calif.]: U.S. Forest Service, minor revision 2017. ISBN: 9781628114256

U.S. Forest Service, Pacific Southwest Region. Stanislaus National Forest, California. 1 map, scale 1:126,720. [Vallejo, Calif.]: U.S. Forest Service, pub. 2017. ISBN: 9781628114126

U.S. Forest Service, Pacific Southwest Region. Trinity Alps Wilderness, Shasta-Trinity, Klamath & Six Rivers National Forests, California. 1 map, scale 1:63,360. Vallejo, Calif.: U.S. Forest Service, minor revision 2017. ISBN: 9781628114232

Wine Road (Association). Wine road, northern Sonoma County. 1 map, scale approximately 1:140,000. Healdsburg, Calif.: Wine Road Northern Sonoma County, 2017.

CalTopo MapBuilder

Posted on March 2, 2018 by socalgovgis - Michael Carson

CalTopo is a handy tool for hikers and those that like the great outdoors. Besides having the USGS topos displayed as a background, it has been enhanced over last year so you can also overlay layers like slope shading, current fire activity and fire history, average sun exposure for a certain date and time, weather (temperature, precipitation, wind speed, and forecasts), and real time data (snow, water gauges, and weather stations), and other stuff! Print out your map too and head for the hills! Check it out.

The Observatory of Economic Complexity

Posted on February 26, 2018 by socalgovgis - Michael Carson

Besides having a cool name, the Observatory of Economic Complexity is a tool that allows users to quickly compose a visual narrative about countries and the products they exchange. It was created by a student working on their Master Thesis in Media Arts and Sciences at the MIT Media Lab.

You can visualize a country’s import/export data by a tree map, stacked, network, rings, scatter, line, or geo map. Check it out!

Rare Total Lunar Eclipse Tomorrow

Posted on January 30, 2018 by socalgovgis - Michael Carson

There will be a rare total lunar eclipse tomorrow … well not that the eclipse is rare, but it will be happening at the same time as the blue moon and supermoon, an event that has not happened in over 150 years.

In the LA area, you will need to get up early to see it. The full eclipse begins 4:51am with the maximum at 5:29am:

lunareclipseinfo

Continue reading →

Nike Manufacturing Map

Posted on January 19, 2018 by socalgovgis - Michael Carson

Many companies are becoming more open about how and where their products are manufactured. The Nike Manufacturing Map is an interactive map which shows the location of independent factories contracted to make Nike products. The map also allows you to access information about the product made by each factory and data about the employees. Continue reading →

Atlas of Historical County Boundaries

Posted on January 16, 2018 by socalgovgis - Michael Carson

Wondering how the boundary of Los Angeles County looked like in 1851? Here you go:

lacobndry1

Here it is in 1887, just before Orange County was created the year after:

lacobndry2

The Atlas of Historical County Boundaries allows you to explore how county boundaries have shifted throughout history. You can also download GIS shapefiles of polygons for each different configuration of a state’s counties or the entire United States, coded by date. Check it out!

CGS Seismic Hazards Program Update

Posted on January 12, 2018 by socalgovgis - Michael Carson

The California Geologic Survey (CGS) Seismic Hazards Program has significantly updated two versions of its regulatory hazard zone map products. First, all GIS data files (in ESRI Shapefile format) for fault rupture, liquefaction and earthquake-induced landslide zones have been re-projected to California (Teale) Albers, in meters, with a North American Datum 1983. In addition, all GIS zone polygons now include attributes that provide the name of the 7.5-minute quadrangle, map release date(s), and links to zone reports and PDF maps. Active fault traces within earthquake fault zones have attributes for fault name and fault type. Continue reading →

SoCalGIS.org

Southern California Government GIS User Group – Working together locally in GIS

Category Archives: Maps/Apps/Charts/Data