GIS Day 2021 - Visualize Santa Clara County through GIS

November 3, 2021

9:00 a.m. - 12:00 p.m.

What is GIS Day? 

GIS Day provides an open forum for users of geographic information system (GIS) technology to demonstrate real-world applications that are making a difference in Santa Clara County. This is an opportunity to learn, share and connect with the public about what the County is accomplishing with GIS technology and to understand how GIS can be used, illustrated and the value of the unlimited capabilities.

GIS Day is FREE event.  We invite you to join us to learn how the County, government agencies, private companies, educational institutions and non-profit organizations use GIS in emergency response, social services and administration to make life better in Santa Clara County.



9:00 a.m. to 9:15 a.m.

Welcome & Opening Remarks

Join us on Zoom!​ (More Options to Join)

Imre Kabai –  Chief Information Officer, County of Santa Clara


Br​eak | 9:15 a.m. to 9:20 a.m.​​​​​


Track A - Power of Imagery and LiDAR | Join us on Zoom! (More Options to Join)

9:20 a.m. to 9:50 a.m.

Take a Deep Dive into Santa Clara County Data with USGS Tools

Rick Brown - Senior Delivery & Viewer Services Specialist, US Geological Survey

Join us as we visualize, explore and obtain 3DEP data using LidarExplorer, 3DEP Elevation Image Server/WCS and the Potree 3D Point Cloud viewer.


Br​eak | 9:50 a.m. to 10:00 a.m.


10:00 a.m. to 10:30 a.m.

An update on Bay Area Regional Fine Scale Vegetation and Landcover Mapping, Including Santa Clara County 

Danny Franco -  Project Manager, Golden Gate National Parks Conservancy

Since 2013, more than two dozen local, state, federal and non-governmental organizations have come together to advance parallel fine-scale vegetation and landcover mapping projects in Sonoma, Marin, San Mateo, Santa Cruz and Santa Clara counties. This presentation will provide an update on the status of these efforts and show examples of how these new vegetation maps are being used. 


Br​eak | 10:30 a.m. to 10:40 a.m.


10:40 a.m. to 11:10 a.m.

The Next Dimension: Our World in 3D

Bridget Marcotte - Project Manager, The Sanborn Map Company, Inc.

Sampa Patra - Senior GIS Analyst, Santa Clara County Technology Services and Solutions

Physicists have studied the possibility of a 2D universe, and it is a natural progression for GIS to evolve from 2D to 3D, essentially creating a digital twin.  This presentation will discuss the following:

  • 3D Modeling and the level of details for models
  • Enhancing 3D models to develop a digital twin
  • Santa Clara County’s application of 3D models and digital twins 


Br​eak | 11:10 a.m. to 11:20 a.m.


11:20 a.m. to 11:50 a.m.

Use GIS Data and Technologies - Simple Ideas Can Make Big Differences 

Michelle Wang -  Senior Application Developer, Santa Clara County Technology Services and Solutions

With current technologies, GIS data can be used to build countless possibilities. In this session you’ll hear about how we address our agents’ business needs in GIS application development. Many times, a simple idea can significantly increase efficiency and quality of our service to the community.


Track B - GIS in Action | Join us on Zoom! (More Options to Join)


9:20 a.m. to 9:50 a.m.

GIS Informing the COVID-19 Pandemic Response in Santa Clara County 

Mandeep Sidhu- Senior Epidemiologist, Santa Clara County Public Health Department

Sampa Patra - Senior GIS Analyst, Santa Clara County Technology Services and Solutions

Over the past 18 months, GIS tools and applications have played a significant role in informing Santa Clara County’s response and community support for COVID-19 pandemic. This presentation covers how GIS informed the planning and implementation of COVID related work to enhance Public Health services for community members. The following topics will be covered in this presentation:

  • Manual work processes for setting up and maintaining the GIS tools and applications for generating COVID analytical reports.  
  • Enhancing geocoding tool for generating aggregated data reports at various geographical levels and population subgroups.
  • Automating analytic report generation through Python (Jupyter), R Studio. 
  • Public-facing data sharing through open data portal applications.
  • Advanced GIS applications for informing community program planning.  


Break | 9:50 a.m. to 10:00 a.m.​


10:00 a.m. to 10:30 a.m.

GIS & Regional Trail Planning 

Rebecca Coates-Maldoon -   Countywide Trails Program Manager, Santa Clara County Parks

Monica Zhang - Associate GIS Analyst, Santa Clara County Parks

The Countywide Trails Master Plan envisions a comprehensive network of over 800 miles of regional trails connecting cities, parks and other open spaces to one another throughout Santa Clara County. While some trails have already been built, others are in various stages of planning. The County recently created a dedicated program to focus on accomplishing the goals of the plan. GIS is playing a crucial role in keeping track of progress, determining trail placement and guiding decisions about development.


Break | 10:30 a.m. to 10:40 a.m.


10:40 a.m. to 11:10 a.m.​​

Operationalizing Spatial Data and Analytics

Dan Henderson - Local Government Team for Esri in northern California and northern Nevada

Matt Twietmeyer - Local Government Team for Esri in northern California and northern Nevada

Government agencies are increasingly leveraging spatial and analytics to help make more informed decisions. Too often though, a lack of modernization creates backlogs of data maintenance, hinders integration of key business systems and impacts recruitment of incoming staff. This session will showcase examples of Esri solutions that are part of the day-to-day workflows for both internal staff and the public. Examples cross a variety of departments and include but are not limited to long range scenario planning, capital projects and public works, assessment and land records and public safety/emergency operations. Matt and Dan will talk through some of the solutions and customer examples to help you inspire and engage your respective organizations!


Break | 11:10 a.m. to 11:20 a.m.


11:20 a.m. to 11:50 a.m.​

Using Layers in ArcGIS at the Assessor’s Office

Jen Zenni - Appraiser, Santa Clara County Office of the Assessor

Lynn Zhang - GIS Analyst, Santa Clara County Office of the Assessor

The Assessor’s Office possesses a vault of valuable authoritative data sets. Using ArcGIS software, data from spreadsheets can be converted into map form. This enables the user to spatially comprehend a sizable dataset, potentially leading to new insights. Join us for a demonstration of the upcoming ArcGIS tool, soon to be launched for internal use at the Assessor’s Office.  

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