Leader lines for inset map
Hi Vladimir, you will need to know the map coordinates of the corners of your AOI within the image; and then also the map coordinates of your inset (on the scale of the first map). Then simply use 'lines' to connect the corners. I would concur with Bernd. I have seen ArcGIS fall over in map layout (it becomes increasingly tedious the more maps you produce to make minor changes and updates, even in the layout), due to an exceptionally large map count. The only way around that as far as I can tell in ArcGIS is to 'code-it-up' and hence you are back in a similar situation as doing your mapping with R. This is especially pertinent if you are happy with your layouts, but your actual image/map is subject to ongoing revision and update (e.g. it is the result of some computational process that continues to be tuned or improved - SWeave?!?!). On the whole, if you are getting 'publish' quality maps from R I'd be interested. Alternatively, we would be using QGIS instead of ArcMap, however, to get 'publish' quality maps for our reporting from QGIS requires retraining of our GIS team and a sizable overhead to work out how best to publish maps with QGIS (currently > cost of the software), whereas our ArcMap workflow is already worked out. Note that you can still run R processes from both ArcMap (through python) and QGIS if required. Regards Rohan On 3 November 2014 05:32, Bernd Vogelgesang <bernd.vogelgesang at gmx.de> wrote:
Hi Vladimir, I'm sure, R is very versatile software, but it sounds really insane to me to try to do sth like your examples in R (If you haven't got to do this hundreds of times with different maps) Map compositions are a matter of graphics programs or even better a Desktop GIS, like QGIS for example. In QGIS, this would be a matter of just adding two composer frames, legend(s) and some lines drawn by hand. "Coding" a layout seems not really reasonable when you can also drag and drop the items in a matter of minutes. Just my 2 cents Bernd Am 01.11.2014, 21:03 Uhr, schrieb Vladimir <sendmeoffer at gmail.com>: Hello list!
I would like to add leader lines to my inset maps. These lines connect the frame of the inset map with the corresponding area on the main map. Good examples are here [1], [2], or here [3]. What is the most convenient R approach to do so? Kind regards, Vladimir. --- [1] http://gce-lter.marsci.uga.edu/public/images/gce_study_ area_blowup_nov07_rev.jpg [2] http://pubs.usgs.gov/fs/fs08203/images/study_area.gif [3] http://www.innovativegis.com/basis/supplements/bm_dec_02/ Ironing_Colorado_files/image004.jpg
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