Tagged Questions

The study and practice of making maps.

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0
votes
1answer
60 views

TileMill OGR Plugin: Failed to read GeoJSON data

I'm trying to load the following into a TileMill layer as the file build1.geojson { "type": "Feature", "geometry": { "type": "Polygon", "coordinates": [[ ...
0
votes
2answers
344 views

Approach to creating a multivariate choropleth map with diverging color scheme(s)

We recently had primary elections in the community I serve. With the results having been released, there have been some requests for precinct level maps. Many of these primary elections featured more ...
0
votes
1answer
73 views

How to simplify shapefiles without losing attributes?

I want to simplify a huge shapefiles using mapshaper. However whenever I simplify the shapefile I loose a lot of data attributes. how can we simplify the shape files while retaining at least some of ...
3
votes
2answers
100 views

When symbolising by category can I make the transparency different for each category? [duplicate]

Normally when I'm making something semi-transparent I edit the transparency in layer properties, but now im trying to make something in the layer (a symbol level) semi transparent. I want to edit the ...
3
votes
2answers
82 views

Create a raster map from more than one shape

I've some shapefile loaded in Arcmap (steets, buildings...) with an appropriate symbology ad I need to convert them to unique raster, to obtain a map (like topographic map) with a specified resolution ...
1
vote
0answers
41 views

How do you create a map that has choropleths that will change with a timeslider? [closed]

I have data for different countries over time that I would like to display in a choropleth map with a time slider that plays automatically on click. What is the best way to do this. Thanks.
0
votes
1answer
92 views

Map generation failing with Kartograph.js

I am trying to generate a very simple map using kartograph.js. But some how my code is not working. <html> <head> <script src="jquery-1.8.3.min.js"></script> ...
0
votes
1answer
82 views

Want to get an SHP file for my coutry Algeria

H everyone , i'm running a clustering test on my country with R, but the problem the clustering doen't look good because of the map i have, i hant to get a bigger map of my country 'ALGERIA' in an SHP ...
0
votes
0answers
67 views

Change palette of basic colors grid in 'Select color' dialog

I would like to know if there is a way to change the default palette of colors (48 Basic colors) which is displayed on the dialog "Select Color". Specifically, I want that when I add a layer the ...
0
votes
4answers
145 views

ArcGIS Labeling Expression when truncation needed to fit in some polygons? [closed]

What would be the expression coding for if the address is 14802. But if the whole address cannot fit inside the building dimessions, then it should be truncated to the last two digits - 02. I am ...
0
votes
0answers
10 views

how to sub in a map id instead of a topo basemap

My apologies for the extremely newbie question, but I've been working with the Bookmark widget (https://developers.arcgis.com/javascript/jssamples/widget_bookmarks_dropdownbutton.html) in the sandbox ...
1
vote
1answer
72 views

How to display raster attributes by default?

I have a 4-bit thematic raster image with a color map from white to dark blue (Figure 1). The values 1 - 6 represent tree canopy cover at various breakpoints. I also created a raster attribute table ...
10
votes
2answers
714 views

How to create a transparent box in the map layout?

Is there a way to create a transparent box in the ArcGIS layout view similar to the one in the screenshot? I have tried without success adding a transparent box by inserting a neatline, adding a new ...
2
votes
2answers
88 views

Rendering a map in QgsComposition on Win 7 / 8 in QGIS 2.2.0 with QgsComposerMap gives blank map

I'm writing a plugin for QGIS 2.2.0 which should render a pdf file with a map and some text. The code is working under Linux (current Arch) and Windows XP, but it's not working on Windows 7 or 8. ...
0
votes
2answers
50 views

How to define the symbology used in QGIS print composer without using separate styles for screen and print

I use scale-dependent symbols for mapping (rendering Openstreetmap vectors as it happens). For instance paths show up when zoomed closer than 1:50000, but only roads show when zoomed out. The rules ...
0
votes
2answers
33 views

How to set symbology based on an attribute of a 1-N table

Now, it is possible to edit geographic features and add elements in child tables using 1-N relationships. I want to construct a stacked - symbology which allows me to represent the multiple ...
8
votes
5answers
719 views

What cartographic line symbol could make a coastline represent water like this old map?

I live in a coastal area with lots of islands. Sometimes with a black and white map it's hard to distinguish land from sea. So I'm trying to replicate this old map's style. I'm trying to do this in ...
3
votes
2answers
237 views

TIF format to view a vegetation Map with QGIS

I'm a new user of QGIS and I'm trying to view a map present in an online GIS dataset. There are several formats for this dataset and one of them is a TIF folder with several files: .tif, .tif.aux, ...
3
votes
1answer
99 views

what dictates the drawing order of overlapping features with in the same layer/feature class in ArcGIS?

I know that in ArcGIS drawing order is controlled by layers, and if I want to make some features be drawn on top of other features I can use definition queries to separate them into different layers ...
1
vote
1answer
131 views

How do I create an index layer for multiple maps?

I am trying to create an index layer of just the area within the Orange lines. I am having difficulty creating this layer due to it not being a simple box area. The goal is to create a index layer, ...
2
votes
1answer
40 views

How to export map in draft mode?

ArcMap 10.2. I want to export map in draft mode. Without layers. Only few rectangles displaying main part of map, legend, scale bars, north arrows, margins and guide lines. E.g. something like ...
0
votes
1answer
135 views

Hover effects using CartoCSS: Is this possible?

I'm trying to make a simple map of parcels in TileMill. Right now when I hover over a parcel, the information for that parcel appears in a teaser. That's simple enough. However, when working with ...
5
votes
2answers
107 views

Removing features whose labels are not displayed?

Using ArcMap 10.0, I am working on a map that shows many villages. Each village has a name attribute that I want to use for a label, but in some areas there are so many villages that not all can be ...
0
votes
1answer
15 views

organize the map theme and style configuration file

I am working on an android application which render some features directly, but these different features should be rendered differently at different zoom level or only be visible from a certain zoom ...
7
votes
2answers
176 views

How to display nebulous boundaries between regions with indistinct edges?

I'm trying to map the boundaries between regions which don't necessarily have a hard edge. For example, areas where languages predominate don't have a distinct edge, but instead have a degree of ...
5
votes
3answers
194 views

Uniform Annotation Font Size in Multiple Data Frames

I'm making a map that has five inset maps that display a smaller map scale where point features are more dense. I have exported my labels to annotations in the geodatabase so that I could fit the ...
1
vote
0answers
11 views

Are there any NTS index maps showing the most recent update?

For the Canadian National Topographic System, are there any index maps available that do not only show map numbers throughout the country, but also the most recently available update for each map? As ...
1
vote
0answers
60 views

Which bins should be used for demographic data for a choropleth map?

I'm currently working on a project which produces a choropleth map similar to a map like this: http://dl.dropboxusercontent.com/u/54512470/Telefondaten_VIZ/index.html That map has 2x5 classifications ...
1
vote
2answers
132 views

What does it mean if a topographic map is indicated to be “West of fifth Meridian”

The Natural Resources Canada topographic map A 741, 83 C/7, edition 3 has a (bilingual) indication at the bottom stating: WEST OF FIFTH MERIDIAN       OUEST DU ...
4
votes
2answers
124 views

What is the the color gradient at borders called?

Many paper maps have an effect around the borders where there is a gradient from the darker color of the borderline to the lighter color of the area fill. What is this effect called? See ...
0
votes
1answer
83 views

arcpy to perform “select by attribute” and display the result on the map in a table [duplicate]

I am thinking to use arcpy to select by attribute, after that I want to display the selected features attribute in a table on the map, how can I make it? Thanks in advance.
1
vote
1answer
101 views

My class using ogr to calculate distance is returning incorrect results away from the equator

In an answer to this question ustroetz kindly provided some sample code for use of ogr to do lat/lon distance and point in polygon calculations. I've created a Python class based on his example to do ...
2
votes
1answer
52 views

Is there general Earth Projection in ArcGIS for Desktop?

I'm starting a new personal project and I need a little bit of helping on setting it up. First off I'm trying to determine the area of a rectangle that is 1 mile in width and the circumference of ...
2
votes
2answers
784 views

Problem with merging and dissolving a shapefile in R

I am migrating from ArcMAP to opensource GIS. I've succesfully installed R and many packages in a Ubuntu 12.04 machine. I am used to linux and programming in C, but not to R and its syntax. I am ...
1
vote
1answer
93 views

Including two different maps in one QGIS Print Composer

How do I use print composer in QGIS 2.0.1 to produce a final product with two different maps on the same sheet? I can't figure out how to use the 'add a map' button to add anything other than a ...
0
votes
2answers
264 views

How to prevent labels from one layer from overlapping features in another layer

I am working ArcMap10.1 software. When I was labeling on point feature automatically label fall on line. Label must not fall on line. I'm not aware how to solve this issues. I have attached an ...
0
votes
0answers
76 views

Arcgis javascript - pan and zoom simultaneously

I'm using my android device to test the arcgis javascript API 's touch support. I noticed that by default, I cannot pan and zoom the map at the same time, like google maps. Am I missing something? A ...
0
votes
1answer
245 views

Creating distributive flow line map showing movement of passengers from bus terminal to several destinations?

I'm writing my final year B.Sc thesis on transportation (pattern of passenger flow from a bus terminal to several destinations). I intend to use a distributive flow line method of spatial movement ...
1
vote
0answers
66 views

Display followers count on Google maps using R

How can I plot the count of followers, locations wise on google maps - Im using R language my data is as below: for(i in 1:25){print(friends_obj[[i]]$location)} [1] "London & Glasgow/Edinburgh, ...
0
votes
1answer
203 views

How do i create a flow line map for my data? [duplicate]

I am trying to illustrate a passenger travel flow map from a road terminal to several destinations on a road layer. I have QGis and ArcGIS, but I don't know much on how to start the work. I already ...
2
votes
1answer
42 views

Overview of statistical maps/charts types

I know of a few ways to visualize statistical information on a map, like choropleth maps, prism maps or simply displaying little bar-charts or pie-charts near locations on a map. But there must be a ...
1
vote
1answer
201 views

mapbox layer in ESRI API

I am building an application primarily with the ESRI API, but would like to load a mapbox tilelayer to use as the basemap as they are just so much more pleasing cartographically. I dont want to change ...
1
vote
1answer
402 views

List of Offensive Symbols/ Colours for Cartography

I was at a data visualization workshop a few days ago and someone there asked if there are any symbols/colours that might offend people when making charts, the presenter didn't really understand the ...
1
vote
0answers
46 views

My fusion table map with search not working

My maps are not working. It shows the search box but not the map: // ]]></script> <script type="text/javascript">// <![CDATA[ var map; var layer_0; function initialize() { map = ...
1
vote
0answers
80 views

Creating Legends for QGIS 2.0 Feature Blend Mode Outputs

I am working on visualizing ~4100 buffered point features. The shading of the buffers is keyed to a field in the data. Because the buffers overlap, I turned on multiply in the new feature blend mode ...
4
votes
3answers
320 views

How to improve cartography by processing map exports with GIMP?

I am about to make a map with a heavy emphasis on cartography. I would really like to spice it up by processing the image in GIMP and I was wondering if anyone had any tips for bringing the ...
0
votes
2answers
71 views

Slippy map tile question and good practice

I have created a small slippy map (Leaflet) and have given it a bounding box. If the user tries to pan/slide outside the given bounds then the map bounces back. Also, the slippy map only has tiles ...
0
votes
0answers
85 views

Legend in FlexViewer - Only show classes that are visible in the current map extent

I am using ArcGIS Viewer for Flex to create web map. The legend widget can be set so that the legend in web map to only show layers that are available at the current map scale. This is great but I ...
4
votes
1answer
194 views

How to write labels with varying significant figures/decimal places?

I have results that range from ex. 113,009 down to 0.00495 - Can someone recommend a way to write/construct a label expression for the following in ArcMap: • If less than 1, use 2 decimal places ...
1
vote
0answers
106 views

Ohio State Plane to Lat/Lon

I've looked into a few other posts/libraries as far as converting between State Plane (Easting/Northing) to get a Lat/Lon value, however I've run into some trouble. I saw here ...