Almost real-time high resolution & low cost baselayer imagery source for Mappt

SkyMap50 satellite imagery and processed composites. Natural Colour, Bathymetry, Soil Classifiction, Soil Humidity

SkyMap50 satellite imagery and processed composites. Natural Colour, Bathymetry, Soil Classifiction, Soil Humidity

While the Google Maps baselayer imagery on Mappt has served our users well, there are limitations.

  1. Out of date baselayer imagery.  Images on Google Maps are not updated at regular intervals.  The baselayer imagery on Google maps is updated at irregular and arbitrary intervals.  For densely populated urban areas (i.e. higher demand) the imagery is updated more frequently than rural areas.
  2. Varying ground resoltion per pixel.  Have you noticed the seams between dissimilar images on GM?  Google Maps are a collection of satellite and aerial images.  The ground sampling distance will vary on location and by acquisition platform.  This can make identifying features from the baselayer difficult, especially when the resoltuion changes in the middle of your image.
  3. GM is limited to natural colour imagery.  We’re used to looking at the earth as a natural colour composite of the Red, Green, and Blue parts of the electromagnetic spectrum.  While that’s good for birdseye style views, utilising other parts of the spectrum such as infrared light are invaluable for identifying plant health, variations in geology, and for the classification of soil types, ground cover, soil humidity, and more.

SkyMap50 satellite images from Soar* are the solution

  • Soar delivers worldwide archival & new collect SkyMap50 imagery.
  • 50cm resolution Archival (historical) images are available from June 2018 at only $6 km^2
  • 50cm resolution New Collect images can be requested at anytime and are usally delivered within 2-3 days.
Access www.soar.earth for access to high-resolution SkyMap50 satellite imagery

Access www.soar.earth for access to high-resolution SkyMap50 satellite imagery

SkyMap50 imagery is delivered as high resolution (50cm per pixel) images in ECW format, ready for loading to your Mappt project.  ECWs are a compressed image format allowing rapid loading and utilisation in Mappt whilst limiting demand on your field device’s memory.  The imagery is of consistent quality, all from the same constallation of 4 identidal satellites.  The SkyMap50 satellite constellation provides for a rapid 48hr revisit time to ensure regular global coverage.

There's no opportunity to opt for cloud-free imagery with Google Maps (left). With SkyMap50 imagery, users are provided with image previews prior to placing their orders for archival images. New collect imagery by default with be 20% or less cloud cover.

There’s no opportunity to opt for cloud-free imagery with Google Maps (left). With SkyMap50 imagery, users are provided with image previews prior to placing their orders for archival images. New collect imagery by default with be 20% or less cloud cover.

The standard deliverable for SkyMap50 satellite images is as a Natural Colour Composite image however the satellite captures 4 bands of electromagnetic light; Blue, Green, Red, and Near Infrared.  Hence the creation of common satellite composites such as NDVI (Normalised Density Vegetation Index) and False Colour can be created and later utilised in Mappt.  With advanced analysis, other composites can be created to assist field use of Mappt.  Alternatively Mappt can be utilised as the ground truth recording utility whereby field collected values are used to calibrate the processed imagery.

How can I get SkyMap50 images into Mappt?

The Soar platform, www.soar.earth, is an online geospatial utility for sourcing satellite and drone images and map hosting and collaboration.  After creating a user account on Soar, users can search for available archival SkyMap50 images for their study area.  If there are no historical images available or if if you require the latest image, you can opt for new collection images.  After placing your order, you will receive progress reports via email and the image will be delivered via your Soar account wheere it’s always available for downloading.  Afterwards the ECW is available for loading to Mappt for use as a baselayer.

SkyMap50 files are delivered in ECW format ready for utilisation in Mappt

SkyMap50 files are delivered in ECW format ready for utilisation in Mappt

 

Google Maps baselayer iamge Yorkton, Canada (left). Acquisition date: unknown. SkyMap50 satellite baselayer (right) Aquired: June 4, 2019.

Google Maps baselayer iamge Yorkton, Canada (left). Acquisition date: unknown. SkyMap50 satellite baselayer (right) Aquired: June 4, 2019.

*Soar is an affiliate of Mappt