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For those of you that may still be following this, I finally found some additional documentation on Section 508 Compliance that comes from the Centers for Medicare and Medicaid Services. I would say this is a good follow-up to the above post from @jwd630. Making Documents Section 508 Compliant


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QGIS can not produce a legend like the right one on your color plate 1.2. There is a currently outstanding feature request to add size-scaled features to the legend in print composer, but it has not yet been implemented. Best try would be to generate it in a third party software or some drawing application, and then add the legend as an image to the print ...


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An idea is: Use the lidar data to classify ground and non-ground points. Then, build a Digital Elevation Model (DEM) from the ground points. Here is a way of doing it. Use the RGB values from the aerial images to color code the lidar point cloud. Here are examples showing how this can be done. Now, it is possible to display the DEM and the color-coded ...


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Try this site from OpenStreetMapData.com: http://openstreetmapdata.com/data/coastlines Or even Natural Earth data has coastlines: http://www.naturalearthdata.com/downloads/50m-physical-vectors/


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You can use the Merge Divided Roads (Cartography) tool for this. Generates single-line road features in place of matched pairs of divided road lanes. Matched pairs of roads or lanes are merged if they are the same road class, trend generally parallel to one another, and are within the merge distance apart. The road class is specified by the Merge ...


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7 colors is not too many. My go-to resource for at least getting a start on a color scheme is ColorBrewer, their tool will allow you to pick the number of data classes you have, the nature of the data (quantitative, qualitative), and a color scheme (dark, pastels, etc), and will give you a preview of how your data will look and the color codes you'd need to ...


1

It is not clear whether “day of week” has as categorical/nominal or an ordinal scale. Since your colors “follow the rainbow from Monday to Friday” I assume that the order/sequence of the days is important for your application/analysis. Therefore, the following applies only if “day of week” has a ordinal scale in your application/analysis: I am not aware of ...


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Color Oracle is a good tool to simulate what your map looks like to a color blind person.


4

Given that you have exactly seven classes (do they really pick up on Sundays?), and that they're categorical (not quantitative) classes, I'd say that having seven different hues and yet similar intensities and saturation levels is a good way to go. You could probably even squeeze, say, orange and indigo/violet‡ in there, in place of the grays. While ...


2

In QGIS 2.8.0 you can do that with the offset option in the Style Layer Properties. In my example with three polylines (they are exactly superposed too): Click in "Simple line" of line2 to display "Offset" option (I set 1 mm): Click in "Simple line" of line5 to display "Offset" option (I set -1 mm): The result obtained (Offset of line4 unchanged; 0 ...


0

What do the "coast", "ro" and "bc" objects have to do with your problem? The issue may lie in that you are using "readShapeSpatial". Have you tried readOGR in rgdal? If you are reading a polygon shapefile, readOGR will result in a SpatialPolygonsDataFrame object. If you in fact, do have a SpatialPolygons object and want to coerce into ...


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It is quite simple: library("rgdal") polygons <- readOGR('path_to/file.shp', layer = 'file') class(polygons) >[1] "SpatialPolygonsDataFrame" >attr(,"package") >[1] "sp" poly_df <- as.data.frame(polygons) # do some staff with "poly_df" that doesn't support SpatialPolygonsDataFrame # then convert it to SPDF back again ...


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Here is a suggestion using ggplot. It can be improved, but it gives you the basic idea. library(maps) library(ggplot2) us.map <- map_data('state') # add PADD zones us.map$PADD[us.map$region %in% c("maine", "vermont", "new hampshire", "massachusetts", "connecticut", "rhode island", "new york", "pennsylvania", "new jersey", ...


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I don't know how you would automatically create an ellipse that contains 75% of your point layer. I would approach this task in this way: Create a grid layer or a custom polygon layer to overlay your point layer perform spatial analysis in qgis by using Vector -> Analysis Tools -> Points in polygon The procedure is similar to what is described as ...


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One possibility underlying the poor kriging performance could be the field plots (location and sampling intensity) failing to capture the spatial autocorrelation (or spatial dependence) in the data. It would be necessary to observe how well the theoretical semivariogram fitted to the data (experimental semivariogram) (Figure 1). If it is the case, one ...


0

By default CartoDB creates 10 categories, but you can create more of them in your CartoCSS code. You'll have something like: #tablename[column = 'Text']{ marker-fill: #ccc; } You just need to add as many blocks with that syntax as you need, and add inside of them the CartoCSS options that you want per each category. Remember to update the Legends too!


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It looks like that feature geometry is corrupted, as the coordinates are just the min/max bounding box of the SRID as set by the WMS. (Plus or minus a few significant digits) The problem seems to stem from EPSG:900913 being defined incorrectly. 900913 is no longer in use, it has since been changed to 3857. The bounding box should be +/- 20 million X and +/- ...


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We use the ThinkGeo .NET tools for WPF, and I would vote for them for a simple application. The support CAD drawings as a layer type, and you should be able to dynamically symbolize them relatively easily by changing the Default styles within the layer. We use shapefiles, but I dynamically switch styles for polyline/polygon/point features to make it seem ...


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The aesthetics might look better if you used colors that are more similar to one another, so you wouldn't get such an affront to your eyes. If you look inside national geographic, they often have basemap features in dark grays and blacks, with dividing lines in white, with a single color representing the variable they are showing. Usually a muted red. Using ...


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The point at (0°, 0°) is not generally given a name All geographers, cartographers and surveyors ought to know the following, but I reference some sources anyway: According to Matt Rosenberg The point at which the equator (0° latitude) and the prime meridian (0° longitude) intersect has no real significance but it is in the Gulf of Guinea in the ...


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Yes, you still reference coordinates (0, 0) as the origin in respect to the coordinate system as a whole. In essence, coordinate systems are grids in themselves. Therefore, terminology between the two are shared. See how ArcGIS refers to the "Grid" location as the origin.


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It's "there where all the data shows up when something goes wrong". At least that's how I call it, or how I often detect when something went wrong. Others would call it Null Island, which is often used in a humorous way. For an occasional good laugh I would recommend some of the Null Island accounts on Twitter, such as Null Island Gang, Maptime Null Island, ...



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