The study and practice of making maps.

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8
votes
2answers
314 views

Problem with plotting map in R

While plotting the gadm map of Russia in R, I have a problem at the 180 degree meridian, where part of the Russian region is plotted separately. You can see it on the plot using the following code ...
0
votes
0answers
329 views

Group/Cluster point symbols together in QGIS and export to SLD

I want to group symbols together in QGIS when they are displayed to close together and thus clutter a map. As the user zooms in these should then be separated. The result should be exportable to SLD ...
2
votes
1answer
320 views

Can I view the Geoserver zoom level in QGIS

I am creating some sld's using QGIS for use in Geoserver and wanted to view the current zoom level so that I can then define it in the zoom level. Is this possible? For example <!-- Local ...
0
votes
0answers
524 views

Unable to dynamically locate map boundary coordinates in OSM/Leaflet

I have been trying for the past hour to take the coordinates of the map edge in a OSM/leaflet application I am making. While I can get the coordinates of the center, and I can get the coordinates of ...
2
votes
1answer
47 views

How does Mapnik Map Similar Features to Images

General Problem I want to be able to select all nodes inside of a bounding box that have similar properties. A good example would be: Map features that represent vegetaion. In other words: Basically ...
1
vote
1answer
244 views

Conversion problems from mappoint to screenpoint using ArcGis Javascript API

I am getting a very strange problem when converting from mappoint to screenpoint. I am using the following code: var sp = esri.geometry.ScreenPoint(512, 151); mp = map.toMap(screenPoint); ...
1
vote
1answer
58 views

How to scale map appropriately?

I am suppose to make a map. The specifications are 1:50k scale centered on a certain point. They want to view a distance of 30 miles from that centered point, but when I scale to 1:50k the map is ...
0
votes
1answer
46 views

map does not show up

I spent to much time working on a project, I saved it .. I'm sure now when I open it again .. arcmap does not display my map ..the layers there and everything else but the map's not displaying , It ...
2
votes
1answer
97 views

Label size in map units, geoserver .sld file

Is it possible to define labels in map units in a sld file? Thanks.
6
votes
1answer
116 views

Is there a way to dynamically hide annotations that intersect map extent border?

I have a feature linked annotation feature class with a number of annotations displayed only partially on the edges of the visible extent of the layout data frame. The link annotation class will be ...
1
vote
0answers
87 views

Road Symbology Issues

I have preparing road symbology using Arcmap 10.1 version. When I was prepared attribute based symbology as a layer shown on symbols were overlapped. I have attached an example image to show the ...
8
votes
3answers
484 views

Distance measurements across UTM zones: use geographic or planar approaches?

I have a survey grid spread across 3 UTM zones (36N, 36S, 37S). I want to find the nearest (or shortest) distances of the centroids of these grids to roads and various points between. It seems like ...
2
votes
2answers
299 views

A library/software to create DEM from a topographic map

In one of my projects I need to digitize video clips showing some natural landscape. Specifically I need to know distances between different areas and elevation levels. I have a topographic map of ...
2
votes
1answer
82 views

How to make Properties > Change Symbol > Symbol Selector > Edit Symbol dialog loading faster?

Is there any way to tweak ArcMap to make the loading of the Symbol Selector and Symbol Editor dialogs faster? I have a lot of symbols in my style files and I want to keep it that way since it is ...
0
votes
0answers
76 views

Is there a JavaScript SDK for Vehicle Tracking?

Does exist a JavaScript SDK for Vehicle Tracking? Like this one:Map Suite
5
votes
1answer
1k views

R : convert a spatial polygon objet to spatial polygon data frame

My goal is to modify an existing shapefile by merging certain polygons. After importing the shapefile and using the UnionSpatialPolygons command, I get the polygon outline that I want. However, this ...
1
vote
1answer
104 views

How to symbolize more than one attribute simultaneously in QGIS?

Each symbol can show different properties such as temperature and pressure, etc. I want to change the symbol color according to one property and size with another one. How can I do it in QGIS? Thanks! ...
1
vote
4answers
303 views

What projection to use in ArcMap for a map that extends over Wgs84 Utm31 and 32

Please i have a Wgs84 Utm map that extends over 2 utm zones(31N and 32N). Using either of them distorts my map and ArcGIs allows you to choose only one projection per map. Please what can i do? Thank ...
0
votes
0answers
19 views

Asp code for distance in SQL sever

I've looked around but I can't find the answer anywhere and im getting kinda frustrated now. I'm using sql server and what im trying to do is to find apartments within a 0.5km radious of a said ...
2
votes
1answer
369 views

Creating maps programmatically using ArcObjects. Adding legends, scale bars, north arrows?

I'm looking for some examples related to the publishing of maps programmatically to image format using ArcObjects. More specifically I would like to add standard map elements such as a scale bar, ...
23
votes
3answers
1k views

Why do we use the terms “longitude” and “latitude” for a spherical body?

To specify a geographic coordinate we use the terms “longitude” and “latitude”. Far as I know, these terms derive from the Latin latitudo (= breadth) and longitudo (= length). In German we use the ...
2
votes
1answer
54 views

How to symbolize different information that's joined to a single plot in a shapefile

I am a student doing an industrial survey in Windhoek, Namibia. We mapped different businesses and later did spatial analysis. Questionnaires were handed to different businesses and then that ...
0
votes
0answers
112 views

Adding imagery or world topo map from arcgisonline to map

I have an ESRI Javascript API application that uses a local Map Service with various feature layers. Now I need to add Imagery or top maps from ArcGIS online as base maps. I am trying the following. ...
1
vote
0answers
131 views

Map Matching? (Finding Nearest Roads…)

I am making Pedestrian Navigation System for my school I created node and arc and digitized buildings with ArcGIS. Then, exported KML to use Javascript Dijkstra's Algorithm to find route. So far, so ...
0
votes
0answers
13 views

can anybody explain how to create a wasp contour map in Q GIS? [duplicate]

can anybody explain how to create contour map,I need to export in .map format.
-2
votes
1answer
457 views

How to digitize a map in QGIS?

I am relatively new to QGIS and using it on windows vista. Problem: I have to digitalise an aerial map and then extract the coordinates. I have absolutely no idea how to start Thanking you in ...
2
votes
1answer
174 views

Data Frame Property options have changed

I have Googled and searched ESRI help files and experimented until I am blue, not to mention reloading ArcGIS Desktop10 for Repair and adding the SP5 to it. I no longer have the options of border or ...
5
votes
1answer
89 views

How to design class breaks for a time series of choropleth maps?

I'm working with a time series of choropleth maps showing the same indicator for the same administrative boundaries, but spanning period of nine years. What would be the most appropriate strategy of ...
1
vote
1answer
50 views

How to combine use gradient symbols for layer properties excluding 0?

I want to visualize my data by using graduated symbols. Now, there are some objects with value "0", they should not be printed on the map (which I solved by using rule-based symbols). But, anyway, "0" ...
1
vote
0answers
57 views

Is there any method to analyze data from fire protection events? [closed]

I want to analyze data from events in fire protection a create some illustration of maps. In short: my task is to find methods for data visualization. Data are represented by point layer (each event ...
1
vote
0answers
145 views

How can I map data points to OpenStreetMap (OSM) line data?

my goal is to filter measuring points of vehicles by mapping them to streets. So I could filter out all the false data located in fields and rivers and so on. I imported my data into a PostGIS ...
2
votes
2answers
269 views

Why do I get different output from gdal2tiles vs. maptiler?

I am trying to generate map tiles using gdal2tiles for an area much larger than MapTiler can handle. However, my tile caches are not showing up on the maps. I checked gdal2tiles by running the same ...
2
votes
1answer
72 views

How to document GIS analysis?

New to QGIS & GIS-meta While I know I can annotate within a map, what is being used for documenting your work:sources of data, choices of color/per layer with each map made ( thinking along the ...
4
votes
3answers
314 views

Why aren't 3D Globes used as the basis of GIS systems?

Maps have been around for thousands of years and have been widely accepted as the means of representing spatial information. We all know about several map projections,each with their merits and ...
0
votes
1answer
359 views

ESRI JS API - don't trigger onClick event when panning Map

I have a custom onClick handler for my map that is meant to add a point wherever the map is clicked. I'm finding that this function is triggered even when I click the map to pan. Is it possible to ...
8
votes
3answers
245 views

What does this style of line on Topographic maps indicate

If I was reading the purpose of this stackexchange site right, I could also ask general map questions. Not necessarily regarding software. Anyways, I was wondering if someone could inform me what ...
3
votes
3answers
133 views

How long for surveying quality GPS to get accurate 3D position information

I recently read an Ordnance Survey Blog article that seemed to suggest that it was necessary to leave the GPS device in use for four hours to gather requisite data. I am aware that "domestic" GPS ...
2
votes
1answer
101 views

Script to either rotate existing text element or insert graphic element

I have about 300 maps that contain a text element that needs to be rotated. I am pretty new to python but I have heard how great it is. This seemed like the perfect task for python but I have had no ...
7
votes
2answers
188 views

What does map scale refer to in map making / field survey metadata?

If I have, say, a printed map at the scale of 1:20000 and the legend says that it was mapped at a scale of 1:10000 does this simply mean, that the surveyors/cartographers made drafts & sketches or ...
13
votes
5answers
980 views

Where to start learning how to make maps with QGIS?

I have no skills in GIS, "map-making," or any other map program. Been a county planner for 25 yrs, where there was always a "drafting" staff. I'm in another agency now and need to be able to produce ...
3
votes
1answer
109 views

How to create a small globe locator map in QGIS?

I've tried searching on gis.stackexchange and elsewhere but can't seem to figure this one out though it seems simple enough. The type of locator I'm thinking of is similar to the one from the map in ...
1
vote
1answer
310 views

Overlapping lines representation

Cartography question. I do have administrative boundries for counties in polygon FC. What tool do I use to prioritise display of features. In example, when lines overlap- I want to show only 1 dashed ...
1
vote
0answers
86 views

Is there a way to show outlines in a multipatch feature in ArcScene?

When viewed in ArcMap 2D environment, multipatch faces are outlined. When viewed in ArcScene 2.5 D environment, multipatch faces are not outlined, yet the symbol in symbology properties still shows an ...
4
votes
3answers
449 views

How to join number of point features into attribute of nearest line segment

I have point shapefile with lot of attributes, that represent road accidents and line shapefile with highways. What i want is to join attribute into line shapefile with value, that represent number of ...
3
votes
1answer
289 views

Preventing ArcMap from Clipping Neatline when Exporting Map

I cannot seem to keep ArcMap from clipping off a fraction of an inch on the edges of the maps I am exporting: I would like the 1.5 point border that is set for the legend to be uniform around the ...
1
vote
0answers
27 views

Adding a class for null value

I'm making a graduated style map and I would like to add a class that would represent null values. I can add a class for zero (0) value ... meaning some of the areas reported zero report, but some ...
4
votes
4answers
673 views

Halo use background color

As you see on the attached image, I labeled contour lines on the map (in meter). Which function will allow the "halo" to take the background color of the map? On the image, the halo is greenish which ...
6
votes
1answer
254 views

locating latitude-longitude point in a piste-map with matrix transforms

I am trying to plot points of a particular latitude longitude on this image of a Swiss mountainous landscape. What I am doing is I have some 54 known location-points plotted on this image (not ...
24
votes
4answers
1k views

How to use directional shading on boundaries for cartographic effect?

The attached screenshot of a National Geographic map shows some beautiful directional shading of boundaries. I'm trying to reproduce this sort of shading for a burn perimeter map, as I want to ...
8
votes
2answers
118 views

How do you store brief cartographical tips, information, possible future designs that you find?

I find inspiring maps and/or brief, 1-line design tips (i.e. "when satellite image is used as a basemap, I like to desaturate the tarnation out of it" that I may want to consider later using in a ...