The study and practice of making maps.

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0answers
23 views

CartoDB: cluster circles aren't proportional

I'm trying to visualize thousands of records on a map on CartoDB using the cluster feature but circles with 100 or 1000+ records have the same dimensions. I'd like to have more discrimination in ...
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2answers
39 views

Is there cartographic convention for displaying text label of highest and lowest values in legend?

The first I have found is to have the lowest value and highest value be displayed like the legend shown below (image source) The second is to have relative numbers at the top and bottom (image ...
2
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1answer
59 views

How to generate maps like some at Wikipedia?

I've absolutely no idea if this is a proper forum to ask this or not. But I know that I can at least get some information here. I was reading few wiki articles on Indian rivers and I'm very much ...
1
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1answer
44 views

Fading or Removing Boundaries in ArcMap?

I have a dot density map of a county. I need to either fade or remove the tract lines. I can adjust the frame transparency but that's not what I'm after. I'm using ArcGIS 10.2 for Desktop.
4
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4answers
165 views

ArcGIS Line Fades, Possible?

Is it possible to fade the ends of a line? I have a map the shows the city of limits and because of its shape, there are some areas outside of the city limits where we don't have major road data in ...
2
votes
1answer
27 views

Align Symbol to Line

I'm using ArcGIS 10.0 - ArcInfo license. I'm a fairly new user. I'd like to align rectangular symbols perpendicular to to the lines that reside nearby. I have two layers. A layer containing lines ...
3
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2answers
68 views

Create map(s) to help determine site selection

I have the task of creating a map in which the objective would be to help determine a site for a conference. I have the following data: Addresses of possible conference attendees (I have already ...
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2answers
47 views

How to make a contour map from a list of points and values? [duplicate]

I need to create a nice map with contours that represent various thematic data on a scale of a country, for instance, average temperatures in Germany. I have a list of coordinates with the values, ...
1
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1answer
47 views

Making flood map greyscale in ArcGIS for Desktop?

I have produced an article for publication and I have just been informed that I must produce all maps in colour and greyscale as the printed journal is only published in greyscale but the article will ...
2
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3answers
46 views

Calculate Color of Object So No Adjacent Objects Repeat

I am attempting to assign one of 16 colors to map objects (e.g. counties, states, ZIP Codes, etc.) so that no two adjacent objects share the same color. I'm seeing tons of articles online about ...
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0answers
27 views

How to map data from USGS NAS database, using HUC?

I am querying the USGS NAS (Nonindigenous Aquatic Species) database. The collection data for the results that are returned don't include lat/long points, but have an HUC (Hydrologic Unit Code). I have ...
2
votes
1answer
82 views

Change countries boundaries color in a shapefile with R

I am working with R to create a map with a shapefile. I would like to change the color of the countries boundaries but I don't know how to do that. Is it possible to change the color? Here is my ...
2
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2answers
47 views

how to extract country border from openstreetmap

I'm trying to extract the Jordanian country border from an openstreetmap. When I click the download link for the file, the following page opens: My question is: How do I save these XML tags as an ...
3
votes
2answers
101 views

What Type of map is this?

Looking to find the exact type of map that the following is : It looks like a hill-shaded topographic map, most likely DEM, but I'm not sure. I need to know for certain so i can contact the map ...
1
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1answer
23 views

Disconnected Satellite map tiles usable with OpenLayers or other javascript api

I'm looking for satellite map, usable with OpenLayer (or with an other js api), with a good scale (at least 100m, MapQuest stops at 1000m) and avaible for a disconnected mode (avaible for download). ...
5
votes
3answers
188 views

How to display two line traffic road map cartographically?

I have two line traffic map. I want to display this maps roads as image below. This images show that when I zoom out from map, roads are showing properly.. And two line road never disappear from map. ...
0
votes
1answer
64 views

Qgis Text/Annotation as layer

Is there a way to add text/annotation to my map in QGIS as a layer? I have a map of vegetation types an point data the text (field names/flurnamne) should be between these two layers. It there must ...
1
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0answers
29 views

How to add vector KML data in an excel table

How do I take a KML (or XML) vector map saved on my desktop showing for example a election ward and then import it into excel as a data input in a field of data. I have information in excel for ...
2
votes
0answers
44 views

ArcGIS Server Map Service - Best Way To Visualize Coincident (Identical) Point Features

I have an ESRI Map Service serving out several point layers with 10k+ point features. Because of these high feature counts, I use a dynamic map service where a symbolized image is generated on the ...
14
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3answers
601 views

Using GIS tools for non-geographical problems

Many other fields have visual/"spatial" problems that can potentially be solved with GIS tools. I know I've used GIS tools for the odd non-geographical task and was wondering how much this happens and ...
0
votes
1answer
54 views

CartoDB - can we overlay 2 visualizations

Suppose we make two map visualizations from a loaded polygon shapefile in the CartoDB free online system. Could we overlay these 2 maps on top of each other in a web page using the CartoDB.js API? ...
2
votes
1answer
81 views

What free software can be used for print-quality map production? [closed]

I am creating art prints using spatial data. I use ESRI software every day for my regular job, therefore I am proficient in GIS. However, I can't afford ESRI software for my art projects at home. ...
3
votes
1answer
23 views

Equatorial Scale

I have seen Equatorial Scale written along with the RF on the World Map in many Atlases, for eg., "Equatorial Scale 1:95 000 000". What does this Equatorial Scale mean and what is the significance of ...
3
votes
1answer
120 views

What is the web map marker called?

I'm referring to this icon I'm just curious as to its origins and what the name of the symbol is. If memory serves, Google Maps introduced it and the other mapping libraries adopted it. Would ...
1
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0answers
32 views

Mapping Superfund Sites using ArcGIS for Desktop? [closed]

I am trying to create a map of all Superfund sites in the U.S., and of course it isn't as easy as I thought it would be. I think I have downloaded all the necessary information, but can't figure put ...
0
votes
2answers
48 views

Alternative to Symmetrical Difference (Analysis) in ArcGIS for Desktop?

I am trying to create a buffer that includes the green buffer where it is not intersected by the purple buffer (Purple buffer is mostly under the green buffer). I don't have the symmetrical ...
1
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0answers
36 views

create a weight raster for a hydrology analysis

I determine affecting parameters of flood flow ( evaporation,vegetation,soil type, rainfall etc.). Then, I start to analysis using Arc Hydro. How do I relate among of affecting parameters? How can ...
1
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1answer
115 views

Legend and coloring of markers with plotGoogleMaps in R

I have a data frame (X) that looks like this: code cluster name longt latit 101 1 A -89.6171 35.24992 105 1 B -90.0154 35.10510 106 2 C ...
1
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1answer
59 views

How to select a line from a osm shape by osm_id

I'm using TileMill to make a map, but I can't seem to be able to format a specific item with a specific osm_id via mss. I have a shape file added as a layer #line: Then, in the features list of ...
1
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1answer
32 views

GRID in MapInfo

I just want to ask for assistance how to create Grid thematic map in map info. I have 5 different points.with different color code. kindly please give the step by step. and im using Map Info.12. ...
0
votes
0answers
38 views

Automatically creating index features for a strip map in QGIS

Is there a free/open source equivalent ArcGIS's Strip Map Index Features geoprocessing tool? I'd like to use QGIS's "Atlas" mapbook functionality, but creating the index layer manually would be ...
0
votes
0answers
37 views

Generating Layercube Format

If not using CartoDB to host your data, how can we modify the input parameters to point toward a layercube file,, and how to generate that file?
2
votes
2answers
103 views

Looking for guidance to create a hydrological map with QGIS and/or GRASS

I have QGIS and GRASS installed . Basically i need this program for making maps something like this: https://www.youtube.com/watch?v=5HuPX7JS7ZA I downloaded DEM from ...
3
votes
1answer
113 views

Is it possible to draw a 3D Choropleth Map in ArcGIS?

What I have in mind is something like these two examples below: Also, if it is not possible to create a 3D choropleth map in ArcGIS, is there some other GIS software package that can draw 3D ...
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0answers
8 views

Using the “Propagate Displacment” Tool, to what degree are graphic conflicts solved

In our cartographic production process, we use the "Resolve Road Conflict" Tool to displace road features that have graphic conflicts. Next to the displaced roads this tool also creates Polygons as ...
0
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0answers
74 views

How to create shape file and show in map using Python?

I have calculated distance between longitude and latitude by import .csv using python. Now I want to show this points or distance between points in map. So how can i do it by using only python? and ...
2
votes
1answer
58 views

How to export subset of data in QGIS to DXF

I have QGIS loaded with multiple layers. I want to save to .dxf but the map is so massive it results in a very large file. I only need a small portion of the map, so I was wondering how I can crop the ...
2
votes
2answers
141 views

How to build a map that highlights only one state?

I'm a journalist working on maps of several Alaska databases. I'm learning as I go and have a question that's probably very basic, but very important for my projects: Using CartoDB, how can I create ...
0
votes
1answer
78 views

Print Selected Area in Map in Arcgis javascript API

I'm working on arcgis javascript api, and I'm trying to implement a selection print tool, I'm new to this api, and don't know how to select area of the map, and after that, print the selected drawn ...
1
vote
1answer
343 views

Calculating distance between latitude and longitude by using python

I have a database of 2000 points, which is in csv format of latitude and longitude. I want to find distance between these points all at once. And also showing these points in Map by using only pyQGIS. ...
1
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0answers
196 views

QGIS 2.4.0-Chugiak: How to threshold NDVI to calculate emissivity for land surface temperature

I am analysing urban heat island using thermal band 6 of landsat TM-5 sensor with respect to Normalized difference vegetation index that derived from the Band 3(Red) and Band 4(NIR). Lansat TM years ...
1
vote
1answer
10 views

Why my map just grayscale mode after use MRT?

i just follow the step to change .hdf file to geotiff file from this site http://duncanjg.wordpress.com/2012/12/11/loading-modis-ndvi-time-series-into-postgis-raster/#comment-1214 and i use data from ...
5
votes
6answers
310 views

What are good colour schemes for large density flow maps?

I came across nice QGIS tutorial for mapping flows. In contrast to Alasdair, I have zero talent in colour choice. Can anybody recommend some good starting points for nice colour schemes (I'd be ...
10
votes
2answers
998 views

How to cartographically represent water flow?

I am modelling water flow on steep slopes for an erosion study. You can see from the screenshot the results from the ArcGIS-based flow analysis. To produce these flow lines, I generated a ...
1
vote
1answer
82 views

GeoServer Label Placement - Place Always Inside Polygon

Is there a way within the SLD to ensure that the label always appears within the polygon? For example, in odd shaped polygons (with a hole, or a horseshoe shape) my labels are sitting outside. I'd ...
1
vote
0answers
40 views

Appropriate reference system for small-scale mapping of the Middle East

I want to create a thematic map of the Middle East that displays certain historic places and regions on a small-scale map (between 1:6.000.0000 and 1:12.000.000). The map has to center the boundary ...
20
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1answer
2k views

Making world map to show where hole drilled through centre of Earth starts/ends on land vs water?

I am discussing drilling through the Earth with my students. The classic cartoon version has a person drilling down in the United States and coming up in China, which has to be wrong because drilling ...
2
votes
2answers
61 views

Best sites to create a collaborative map?

I need to suggest a tool to build a map together, ie. let multiple users add POIs and routes on a map. I know about OSM-based Umap but are there other online tools I should know about?
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0answers
65 views

Trying to make a depth map of a lake but can't get the contours to show up right

I am trying to make a depth map of a lake. I am using the contour plugin to generate contour lines. The problem I am having is that when I use the plugin the contours come out right except on the ...
2
votes
2answers
43 views

Formula for charting a course around the globe, given a location and degree heading?

I'm looking for a formula that takes a long/lat coordinate and a degree heading, (e.g. "I'm standing in San Francisco and I'm facing 45º from north"), and which can draw a line across a map projecting ...