Aerial Imagery

Resources

https://www.arcgis.com/apps/mapviewer/index.html?layers=b85d8ef7f09c49bd9170f00b3ce3b11e
Within OCAD (see below)
MassMapper
Vermont Imagery Finder

Load Georeferenced Google Maps Aerial Images

Then this is best done with the function Online Map Services. The function loads a Google Maps image directly at the right place.

This is how easy it works (Video you YouTube):

– Open the Online Map Services in the OCAD Background Map menu.

– Move and zoom in Google Maps to the desired extent.

– Load the image correctly geo-referenced as background map.

If the map is not geo-referenced, you need to adjust the Background Map afterwards.

Download Georeferenced Satellite Images

Mass Mapper

Jon Campbell's instructions

Got to MassGIS’s MassMapper

Earth Explorer

(obtained from Jordan Laughlin's presentation)

https://earthexplorer.usgs.gov/

From OCAD Blog

SAS.Planet is a free application used to view and download geo-referenced satellite images submitted by such services as Google Maps, Bing Maps, Yandex.maps, Yahoo! Maps and many more. Sometimes ESRI ArcGIS Imagery is valuable. Find a source with useful info like resolution and date.

The satellite images can be downloaded and then loaded into OCAD as georeferenced background maps.

We can recommend the following workaround:

Download SAS.Planet from the web and run the application.
Zoom to your desired location and select a region. Second from left menu item > polygonal selection.
Hit green checkpoint in little popup. You get selection Manager. Open the Selection Manager and edit the tab Stitch. Don’t forget to create a file for georeferencing.
Download data, at zoom level 20. When done, go to the little box bottom left, to get back to Selection Manager. Go to Stitch tab now.
Stich the data together. Projection: not a lot of choices. EPSG 3785 projection (not a lot of choice). In the name, put descriptive name and zoom level (Z20) and CRS (EPS3785). "Google image St Lawrence College Z20 EPS3785.jpg". Add the prj file so you have the georeferencing information! Go with zoom level 20.

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