The study and practice of making maps.

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8
votes
2answers
616 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
13 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
20 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
votes
1answer
1k 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
28 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?
1
vote
0answers
23 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
33 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 ...
4
votes
1answer
41 views

How to create a map colored by distance to nearest point in R

I'm new to GIS and R-- hope this question makes sense. I have a dataframe(geo07) containing two variables that record the long/lat values for about 6000 points (mat_long & mat_lat). These ...
6
votes
2answers
161 views

Geo-referencing an old map

I'm trying to georeference this part of an old map of Indochina. . The full extent gives more information: . To do so, I used QGIS and tried to infere the datum, I tried "Unknown datum based on ...
1
vote
1answer
10 views

setting Arcgis world imagery as data source for a mosaic data set

I have created a mosaic data set and want to set esri world imagery basemap as my data source but i am unable to connect to the server can anyone help
3
votes
2answers
93 views

cartodb.js highlight the polygons on mouse hover for Google map v3

We are using cartodb.js with Google map v3. We are trying to highlight the polygons on mouse-hover. Is there a way to highlight the polygon on Google map using cartodb layer?
0
votes
0answers
20 views

Creating REST map services from external web services - how can it be done?

I am not sure if the terminology is correct here so apologies in advance. I am working towards creating REST map services for a map view and part of this work includes developing map services on ...
1
vote
0answers
29 views

Is there any way to create a legend from label classes or annotations in ArcGIS 10.2.2?

I have a single "geonames" layer with 56 label classes and another few layers with around 10 label classes. Each class has a different font and colour or graphic. I would like to add most of these ...
3
votes
1answer
48 views

How to plot a full hemispheric orthographic projection in R

I want to make a plot like that using R: All I want is the country borders as seen from outer space, no fancy colors needed. It seems I need to use the spTransform function, but it gives me a "non ...
0
votes
2answers
57 views

Curved Arrows showing trade ARCGIS 10.2 [duplicate]

I have 10 points that represent the centres of countries. I want to show with arrows the flow (some kind of trade) from one country to another. The way that my table of attributes is constructed is ...
1
vote
0answers
33 views

Help embedding Openlayers map in Eclipse BIRT report

i have this code, it displays the zoom buttons only but it doesnt display my map. what could be the problem? <html> <head> <script ...
5
votes
2answers
80 views

Automate Splitting Polygons Into Sections

I've searched for similar problems on this topic but can't find a solution. I need to split many, many, many cemetery sections into 8 (mostly) equal pieces each. Each section is for the most part ...
3
votes
1answer
146 views

How to create transparent text?

I am trying to insert a watermark into a map using ArcGIS. As you can see from the screenshot, I have the text in place, although I need to make the text transparent (e.g. 50% transparency). I used ...
1
vote
2answers
63 views

Creating Land Use Change Map in ArcGis 10.2

I need to create a map with multiple dataframes showing the percent change in land use - one each for agriculture, developed, and forest. Percent change has to be labeled on each county and color ...
2
votes
2answers
99 views

Multiple font markers in shapefiles in QGIS?

I'm making a UK phase 1 vegetation survey map and require to show the dominant plant species in a given polygon. In phase 1 these are shown as 2- or 3-letter codes e g Ri, Cys. These codes need to ...
1
vote
0answers
27 views

georeference a grid by using a script

I've got an image and a set of coordinates, which represent a grid, that looks similar to this: What I'm looking for is a script, that would transform my image, by using such a grid. Edit: My ...
1
vote
0answers
28 views

Creating Interactive Map Using Something Other Than Google? [duplicate]

I have a Roleplay Forum, and I would like to add a map of my Roleplay World to the website. I would like my map to be clickable, and have each location take you to a place on the forum. I don't know ...
1
vote
0answers
29 views

ArcGIS SDK for .Net (used in WPF): update map's zoom parameters after changing base layer

I'm having the following issue: Suppose I have a Map object and 2 base layers (a world map and a street map). A world map doesn't let us view the map too closely. The street map allows us to view as ...
0
votes
0answers
26 views

Poster or Map Presentation Guidelines?

Is there a website that will guide me through for various kind of paper size to create a/ or several presentation for digital or hardcopy maps/ or poster with different fonts, display area, title and ...
1
vote
1answer
35 views

Has anybody successfully added NFHL (National Flood Hazard Layer) to ArcGIS for flex?

I keep getting the following error when I add the map service to my application: apServer layer failed to load: Fault code: Channel.Security.Error Fault info: Security error accessing url Fault ...
0
votes
1answer
38 views

how to display movements of a moving object in cartodb

I have few GPS tracks with lat long and timestamp. I want to present them on a map and to show how the movement took place using the time series location values (X,Y,T). I searched a lot but could not ...
3
votes
0answers
28 views

How do I map points on a 2D map to a 3D illustration of the same area? [duplicate]

I'm looking for advice on how to build an algorithm that maps any point on a map to a point on another map, interpolating where needed. Let me better clarify with an example of what I concretely ...
0
votes
0answers
60 views

What is GIS for Indigenous Peoples?

I am working on a short course for a group of indigenous 10-15 year old children in a couple of weeks and want to start the program with a short intro (90s) of what GIS is and how it can help them. I ...
0
votes
0answers
15 views

Map services error in Firefox bug but don't understand

I am currently harvesting many web map services on an online map view. The services are configured in Oracle (Toad). Most of the maps seem to be working apart from 10 or so. I can see them in the ToC ...
3
votes
2answers
258 views

Examples of ASCII-art maps

According to Wikipedia, ASCII-art is one of the earliest techniques used for digital graphical design. An ASCII-art technique can be traced back to 1939 and computer-art pioneers have used it since ...
3
votes
1answer
44 views

Comparing data from two different time periods

I am trying to compare DWI frequency over the period of 3 years. I want to create 3 maps, with each one showing where DWI's occurred during 2011, 2012, and 2013. I have the point data for this, but I ...
2
votes
0answers
38 views

Generating a map from a shapefile using ms4w mapserver [duplicate]

I am trying to generate a map from a shapefie. Through some initial searching, I wrote the code below but I am getting just a white page. Below is my code: MAP # To enter comments into a mapfile ...
2
votes
0answers
52 views

Using R to subtract the polygon area of one shp file from another

I'm looking to produce a map from two separate maps in R. My Maps files are as follows: ftp://ftp.cpc.ncep.noaa.gov/GIS/us_tempprcpfcst/610prcp_20140822.zip #Map1 ...
1
vote
1answer
38 views

Equal Area Projection for Central Ethiopia (37N)

Can anybody please tell me what is the best equal area projection for central highlands of Ethiopia. I am assuming Albers Equal Area Projection. Any suggestions?
2
votes
1answer
47 views

What is the correct cartographic projection to calculate a Voronoi tesselation?

I have a set of points with known geographic coordinates. I would like to compute a Voronoi tesselation from these points in order to obtain areas of influence. The geometrical area of each Voronoi ...
2
votes
2answers
41 views

Are CartoDB Map views by month or by year?

We have 10000 map views with the free version of CartoDB. Are they reset every month or is it the maximum views for the all utilisation ?
3
votes
1answer
46 views

Why is the OSM map itself is not visible in my qgis window?

I'm new in working with QGIS. I have tried to download an OSM map of Rome and its surroundings into my QGIS. As far as I am concerned, I have followed each step which I could find on various ...
1
vote
0answers
69 views

How to import a map consisting of pictures

I want to built some sort of Fantasy Map with Quantum GIS. The whole map is built out of 128x128 single pictures, 16384 in total. It should be a flat map. How do I import these pictures and align ...
1
vote
1answer
20 views

Tilemill: Re-Export failed tiles after export

My Tilemill exports (MBTiles) tend to fail quite often lately... (Resume Tilemill MBTiles export after crash a bounty is waiting for anybody who helps me there btw ;-) ). We kind of solved the problem ...
1
vote
1answer
35 views

Finding coordinates of the image corner

I have a .bmp image with a map. For creating image i used a Ingeo 4.4 and function MakeImage() What i know: Height an Width of bmp image dpi Map Scale Image Center's coordinates in meters. What i ...
7
votes
6answers
609 views

Making a map that can be easily resized or scaled

I've recently been dealing with a map requestor who wants maps resized at the very last minute -- from 8.5x11 to 22x34, or from large poster-sized to "something that can fit in a report" (those vague ...
3
votes
2answers
54 views

Step by step contour creation algorithm

I do seismic processing, and recently have been moving into doing contours. I have a question on the exact way this is done. I have watered down my problem so that I can understand from 'first ...
1
vote
0answers
43 views

Show large information in a map (millions of points)

I have millions of points (census data) about 1.5Gb in a text file. But I only want to show an area based on this points like a heat map, so maybe I have to build polygons based on these points. What ...
3
votes
1answer
60 views

How can units be defined in QGIS for the Rasterize tool?

I am using QGIS 2.4 (Chugiak) via the kyngchaos build for OS-X. My question is--when using the Rasterize tool to convert a point vector layer to a raster and using the "Raster resolution in map units ...
1
vote
1answer
37 views

MapXtreme Java Edition

I'm learning GIS in Java with MapXtreme Java Edition but I can't find MapXtreme Java Edition file setup for Window (trial). Can you share link download or software for me?
2
votes
1answer
26 views

Smart quotes in ArcGIS (titles, legends)

Is there a way to ask ArcMap to use "smart quotes" in map titles, legends, etc.? This is what I've currently got on my map: I'd like the quotation marks and apostrophe to be curved instead. Pretty ...
1
vote
3answers
49 views

Geographical media coverage map - USA

I'd like to know if there are some maps giving the geographical coverage of the media publication, for example, a map giving the counties or even the cities where local newspapers are sold, and a map ...
1
vote
0answers
22 views

QGIS strongly offsetted symbols for categorized layers not visible on layer list (layer panel)

I am constructing a symbology for telecom analysis, which so far is mainly point and line features. So far it is working very well except that I have to offset the symbols to be able to avoid ...
4
votes
3answers
191 views

Manually classifying graduated data outside of range in ArcGIS

I have two shapefiles representing grids with values that are symbolized with graduated colors, shown below: You can see that the two shapefiles encompass similar ranges of data, but assign ...
4
votes
0answers
56 views

Mask Bridge with Road

Is there a tool to create mask between bridge line/point on road? The requirement to have gaps 0.2mm between road and bridge and the offset fill with white color. For now, I add a white line attach to ...