Today I thought I would pull together some of the information that has been produced as a part of my GRDC sponsored Nuffield Scholarship on the use of unmanned aerial vehicles in the grains industry. It has been an amazing experience and I encourage farmers from around the world check the Nuffield organisation to see if a scholarship would suit them.
Satamap is a web based satellite imagery service for precision agriculture. It’s available at satamap.com.au. This is a project I am part of so the following is not an independent review, just a quickly written explanation of this innovative app. I understand my audience is fairly schooled in most things precision agriculture so I’ll skip the marketing talk and get straight to the point.
Today we are launching Satamap. This is a brand new service making up to date satellite imagery available to everyone. Our focus is on agriculture, therefore all imagery is paired with a vegetation index called Satamap Vegetation Index (SVI). It is similar to NDVI but we believe it is better at showing variability in high biomass crops and less impacted by soil colour. The colour ramp we use to represent the SVI values, while in your face at first, is designed to show biomass variability in all crops, at all stages of crop growth at all times of year. The colours remain consistent year round so that, for example blue represents the same as blue and red, red no matter which location or time of year. This is important because the Satamap slider allows any two image dates to be laid over the top of the other and the ability to slide between the two for a direct comparison. The same can be done with the standard colour imagery as well.
This service does not require drawing in of paddock boundaries or limit you to a small area of interest. Subscriptions are based on a 3 million plus hectare tile. It takes 5 minutes to subscribe and you have access to the whole area and an archive back to winter 2013. Imagery is captured at a 16 day interval. Cloud can get in the way at times which can be frustrating but we are working on increasing our imagery availability to reduce cloud impacts. The colour imagery has a resolution of 15 m and the SVI is 30 m. We cover all major cropping regions of Australia.
Satamap works best in an iPad or similar tablet device, but functions equally as well on a desktop computer. Other standard features in Satamap include custom markers, area measurement tools, imagery export and GPS location on the map. All these features themselves could warrant an article, but best to just watch the video to see some of them in action.
Satellite imagery has been available to agriculture and related industries for decades and those that have invested the time and money will attest to the value and significance in this technology but admit that all too much the time and money is often the biggest hindrance. We are aiming to solve these problems with Satamap and bring out the potential of satellite imagery for agriculture. Agronomists, grain traders, farmers, suppliers and more can all benefit from rapid, cost effective access to up to date satellite imagery.
We are in constant development. We are working on offering higher resolution imagery, ground truthing data points, exporting with post-processing and more. Currently only available in Australia, very soon we will be opening up to other parts of the world. Thanks for checking in.
QGIS rivals ArcGIS as desktop GIS software especially within Precision Agriculture. The difference is that QGIS is Open Source and therefore free to use for personal and commercial use. Open Source has many other advantages. If you are familiar with ArcGIS you should give QGIS a go.
If you run Windows I recommend installing using the OSGeo4W installer. Run the ‘Desktop Express Install’.
‘Out of the box’ QGIS is very capable. But it is not until you install a few powerful plugins that it’s real potential is revealed. So far the plugins I use on a daily basis are: SEXTANTE and Table Manager. SEXTANTE is not much good to me without SAGA. Together these make available a comprehensive list of common Vector and Raster GIS algorithms. Optionally install TauDEM and Orfeo (I have installed these but not yet used them).
Setting up SEXTANTE in QGIS 1.8 (Windows 7 & 8)
Install Sextante Plugin (In QGIS: Plugins > Fetch Python Plugins).
So SEXTANTE has access to the SAGA algorithms it needs to be downloaded and installed: SAGA.
Configure SAGA in SEXTANTE (In QGIS: Analysis > SEXTANTE options > SAGA), insert SAGA folder and check Activate box.
Similar to SAGA, download and install TauDEM 5.0.6 & MPICH2 (make sure you follow install instructions on the download page).
Configure TauDEM in SEXTANTE (In QGIS: Analysis > SEXTANTE options > TauDEM), insert MPICH2 bin directory, TauDEM command line tools folder and check Activate box.
Install Table Manager
Plugins > Fetch Python Plugins
Search for Table Manager and click Install.
With these two plugins, especially SEXTANTE, QGIS becomes extremely capable.