Use the Export tool to export Vertical imagery as a high resolution image or a georeferenced image. 



Export High Resolution Image

Exporting a high resolution image is very useful when you need a high quality image export, for example for printing imagery.

Click the Export tool and select High resolution image from the drop-down menu.

Select the area you would like to export, and choose the resolution you want for the exported image. Click Download Image to save the image file to your computer as .JPG.



Export Georeferenced Image

Exporting georeferenced files is very useful when you want to use an image in third-party applications, such as ArcGIS or Autodesk. 

Click the Export tool and select Georeferenced image from the drop-down menu.

Choose the relevant projection for your export, and the resolution you want for the exported image.  The Esitmated file size is a very rough estimate as to the maximum file size that will be downloaded. The actual size will often be much lower because it is difficult for us to estimate image compression efficiency in advance.

C lick Download Files to save the image and georeferenced files to your computer as zip file. The image file is saved as .JPG, and the georeferenced file is saved as JGW.

You can import the image and its JGW to any application that supports georeference files. Examples are AutoCAD Map 3D or Civil 3D, ArcGIS, ArcMap, MapInfo and QGIS. See our guides on importing georeferenced jpegs for more information.




The JGW georeference file has the same filename as the image file, and its name must always match that of the JPG. The filenames follow this format:

<projection>_Date<YYYYMMDD>_Lat<latitude>_Lon<longitude>_Mpp<resolution>

For example, an image downloaded in the EPSG:3785 (Spherical Mercator) projection from a September 10, 2015 survey centered at (37.483834,-122.144782) with resolution of 0.597 meters per pixel would have the filename:

EPSG3785_Date20150910_Lat37.483834_Lon-122.144782_Mpp0.597.jpg


Parameters in the Export tool

Projection

Projection is an important setting. When the spherical Earth is "projected" onto a flat map surface, distortions occur. Like Google, Bing, and MapQuest maps, we use Spherical Mercator (EPSG:3857, also known as EPSG:3785 and EPSG:900913) in MapBrowser. This maps the sphere to a convenient rectangle, but has large distortions away from the Equator.

When saving images, we recommend using an available local map projection so that scale and measurements are accurate.

Resolution

Resolution allows you to specify a resolution in meters per pixel. The available options are determined by the size of the box you define.

If you save in the Spherical Mercator projection, meters/pixel is only a rough estimate due to that projection's inherent distortions.


There is a system limitation to maximum image size, which varies by coordinate system. For the default Web Mercator coordinate system, this limit is 50 megapixels. Due to the way local map projections are rendered, the maximum image size for locally projected imagery may be lower than 50 megapixels. If the area you define is too large for the highest resolution you will see the message "For a higher resolution please define a smaller area." This tool permits saving of images at extremely high aspect ratios, which can be very useful when saving along transportation routes.

  • You can use the high resolution option for Vertical imagery only.
  • Annotations and measurements are not included in the exported high resolution image. 
  • Rotated imagery cannot be exported in high resolution, instead the imagery is exported  in its original orientation. 
  • Georeferenced imagery is exported  in its original orientation. 




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