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17

The location on the opposite side of the earth from your point is called your antipode or antipodal location. If you want to produce an antipodes map on your own there is a simple relation to consider: Your antipodal location by lat-long will be identical to your location, except with the direction reversed. For example, the latitude of the antipode of 40° ...


6

The Map has mostly remarks in French, so I would suggest to use a French coordinate system, and not Everest (who was British). The French used coordinate systems with a prime meridian based at Paris, so EPSG:4821 Voirol 1879 (Paris) is a good start-off. With that, the 100° meridian is hitting the Malaysian coast near Kota Baru, as in your map: You can ...


5

As far as I know, there is no way to make text transparent in ArcMap. My suggestion for a workaround would be to export to PDF and then add the watermark using Adobe. That's what I do to add watermarks to my maps. The limitation of this would be that it requires Adobe Standard I believe. If you don't have Adobe Standard, here is a link with some other ...


5

Here is a method using arcpy geometry objects. The script creates a rotated hull rectangle around each polygon, splits it into plots, and clips the plots to the original polygon. As Aaron mentions, you could likely achieve this with the fishnet tool, but I could not figure out how to (in Step #2) "use logic to find the ordinal coords" for rotated polygons. ...


4

A new feature in the current versions of QGIS (introduced in 2.4) was a preview test for different types of colour blindness. This blog article from earlier in the year explores it a little.


4

You could automate this approach with Python using the Create Fishnet (Data Management) tool. You can extract all of the pieces of the puzzle to do this analysis with python and then simply plug the pieces into the fishnet function. You need to start by iterating over all of the section polygons. Otherwise, you will get one large fishnet covering the ...


2

A search with Google threw up these pages... http://blogs.esri.com/esri/arcgis/2011/09/06/creating-radial-flow-maps-with-arcgis/ http://blogs.esri.com/esri/apl/2012/09/12/generating-distributive-flow-maps-with-arcgis/ Someone has even created a tool that flows around country boundaries. ...


2

One of the things you can do is request the geometry from cartoDB as in a geoJSON format as part of your SQL query: SELECT *,ST_ASGEOJSON(the_geom) AS geometry FROM your_table Google can take the geoJSON and convert it to polylines and polygons each time you mouse over a feature. Here's an example I've done with a polyline. You could do the same thing ...


2

To begin with I would recommend you read this tutorial on georeferencing in QGIS http://docs.qgis.org/2.2/en/docs/training_manual/forestry/map_georeferencing.html Yes you can georeference this map. I would recommend you use a good quality flat scan of the map if possible. Avoid a crease running through the image. Accurate georeferencing depends on the ...


1

Google maps engine is quite handy for collaborative projects. Map object creation tools are easy to use for non-expert users.


1

Esri world imagery layer is already a mosaic "in the cloud". I do not think you can download it and use it locally. You would also need a very large storage space if this was possible.


1

The reprojection might fail for points that are located at the backside of the globe. Best solution is to clip the data to the visible hemisphere. I have given some advice on that here: Where did the polygons go after projecting a map in QGIS? and in the questions in the Linked section of that topic.


1

If you know how to use javascript and d3, then the spatialsankey d3 plugin might help. Here is an example application that does something similar to what you ask, though only to show flows in one direction.


1

You first need to create your different Data Frames (3 total I assume). Just use the Insert Menu to insert a new data frame. Copy the LU Change layer into each data frame (you can just drag it down). Open Layout View to organize the different data frames they way you want them. Next symbolize the different copies of the same layer based on the pctChg_dev ...


1

Perhaps I'm making this too simple in my head, but I would double click the layer on which you need to label %change, and go to the Labels tab, turn on labels and select the correct field to display. Then, in the same properties window, go to symbology and symbolize based on your %complete field. I don't quite understand your statement about isolating ...


1

I had the same problem. The solution I found was to go into Data Frame Properties click the Coordinate System tab and then double-click on the projection you are using to bring up the Projected Coordinate System Properties window and change the Linear Unit (it's a drop down near the middle) to feet or yards or whatever unit you want. It will still be greyed ...



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