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follow this link it is helpful http://www.tzgis.blogspot.com/2016/02/how-to-avoid-arcgis-crashing-during.html


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With most softwares, the RMSE is computed either in input coordinates or in output coordinates. For on screen georeferencing, input coordinates are usually expressed in pixels. If the pixels are used, you need to multiply this value with the size of your pixel in meter (which can be found in your image properties). In the article that you mention, this ...


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AffineWarper Performs warping operations on the spatial coordinates of features. It is used to adjust a set of observed input features according to a spatial transform defined by a set of control vectors. This transformer computes an affine (scale, rotation, and offset) transformation based on Control vector features and applies this transformation to ...


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If this is the walkable food data: https://www.opendataphilly.org/dataset/philadelphia-food-access/resource/07f115d1-5b8e-4620-9720-9c310ba29896 Download the zipped shapefile (or kml), go to your data dashboard on Cartodb (http://yourname.cartodb.com/dashboard/datasets), and drag the zipfile onto the page: It's already "georeferenced" - but maybe this ...


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This is just my thoughts as I think about the problem. Unless you are georeferencing to a very high level of accuracy (I don't just mean zooming really far into ArcMap because even your GPS co-ordinates will have error etc), in order to fit that extra point on the co-linear line the data will be warped by a more complex algorithm that can't fit exactly ...


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To calculate scale you need to know two things, a distance on the map and the length of the same line in pixels or inches etc. You then divide one by the other to give a ratio of 1pixel (or inch) to X metres (or feet). To make life easier we usually use the width or height of the map as we know the bounding box of the map, and the size of the image. If you ...


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If you click "Fit to Display" in the Georeferencing menu, the un-georeferenced Image will be moved to the current window location making it much easier to georeference.



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