Skip to main content
Las Positas College

Work with the Data Yourself

      1. Download and Install QGIS
      2. Download any of the monthly data sets, see them below.
      3. Import the data into QGIS.
      4. Share what you find!

3 Steve's Winery

We are grateful for a budding collaborative effort between award winning 3 Steves Winery and the Drone Tech Program. In a similar manner as our own vineyard, we are currently conducting overflights at 3 Steve's seven acre three varietal estate vineyard as an additional method for crop management. Below are monthly aerial images

Monthly Data Sets

Below are a selection of our monthly data sets. There are only 2 types of data available:

      • RGB are color orthomosaic images in a non-compressed "tiff" format.
      • NDVI are agricultural indexes saved a non-compressed "tiff" format.
      • Zonal Statistics are a quantitative representation of the NDVI index, each zone is a 8' wide by 6' delineated box overlayed upon the rows, these boxes mimic a single vine, in this case there are 72 rows that contain 5,972 areas of data. 
      • Common statistics that we can visualize:

        • Count: count the number of pixels (a proxy for biomass)
        • Sum: sum the pixel values
        • Mean: mean of pixel values
        • Standard Deviation: how tightly all the values are clustered around the mean.

         Other statistical methods to view the data

        • Median: median of pixel values (a good representative of the central location of data)
        • Min: minimum of pixel values
        • Max: maximum of pixel values
        • Range: range (max - min) of pixel values
        • Minority: the less represented pixel value
        • Majority: the most represented pixel value
        • Variety: to count the number of distinct pixel values
        • Variance: how far a set of numbers is spread out from their average value.

Data Sets

(OPEN THE RELEVENT FOLDER TO DOWNLOAD THE DATA)

2026

MAY 29th - RGB - NDVI - ZONAL STATISTICS
May 8th - RGB - NDVI - ZONAL STATISTICS
APRIL 3rd - RGB - NDVI - ZONAL STATISTICS
MARCH 12th - RGB - NDVI - ZONAL STATISTICS
JANUARY 29th - RGB - NDVI - ZONAL STATISTICS

 

2025

December 19th - RGB - NDVI - ZONAL STATISTICS
October 23rd - RGB - NDVI - ZONAL STATISTICS
October 9th - RGB - NDVI - ZONAL STATISTICS
September 16th - RGB - NDVI - ZONAL STATISTICS
August 25th - RGB - NDVI - ZONAL STATISTICS
August 8th - RGB - NDVI - ZONAL STATISTICS
July 25th- RGB - NDVI - ZONAL STATISTICS
JUNE 27TH - RGB - NDVI - ZONAL STATISTICS
MAY 29TH - RGB - NDVI - ZONAL STATISTICS
MAY 13TH - RGB - NDVI - ZONAL STATISTICS
MAY 9TH - RGB - NDVI - ZONAL STATISTICS
APRIL 22nd - RGB - NDVI - ZONAL STATISTICS
APRIL 4th - RGB - NDVI - ZONAL STATISTICS
MARCH 21st - RGB - NDVI - ZONAL STATISTICS
JANUARY 22nd - RGB - NDVI - ZONAL STATISTICS

 

2024

December 13th - RGB - NDVI - ZONAL STATISTICS
November 1st - RGB - NDVI - Zonal Statistics