The ratio between distances on a map and distances in the world

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0
votes
1answer
140 views

Default Opengeo suite print module- scales given in selector differ when using the zoom slider

Using a default installation of the 3.0.2 suite, opening the Composer view(with the MapQuest OSM tiles as background) and clicking print (to pdf) to activate the print preview there appears to be a ...
2
votes
1answer
206 views

Maximum scale dependent visibility changes from 1:0 to -2147483648:1

QGIS 2.0.1 Dufour. When i open the layer properties and the scale dependent visibility is unchecked and when i check it, the maximum (inclusive) shows 1:0. I click Apply, OK, reopen layer properties ...
0
votes
1answer
25 views

Divide into grid and Mosaic using google earth?

Is it possible to download 1:2000 scale of a town using google earth image? If divide the whole area into grid and mosaic them is an option, how it is done using google earth? I tried using grid. But ...
0
votes
1answer
22 views

NHD layers won't redraw in ArcGIS 10.1 at small scale?

If I am already zoomed in to a smaller scale and then add the NHD Hydrography dataset (already clipped to just Texas), I can see all the NHDFlowlines, NHDAreas, and other layers that come in the ...
3
votes
0answers
35 views

Printing a 1" scale from 2.8.2 Print Composer

I'm working on a small-scale site survey in qGIS, and for engineering purposes I need to print physical copies of the map that can be used with an engineering ruler. Basically, I need a way to print ...
2
votes
2answers
76 views

When does a local system introduce errors in a map due to the earth's curvature?

If the extent of a map is very small, like a building plan, there is no coordinate reference system used. To which scale/size of building is that acceptable? Of course it depends on the precision ...
0
votes
1answer
520 views

Setting a scale range for labels in KML files

Is there a way for labels to be displayed in KML only when zoomed in (or out) beyond a certain scale range, just as it is possible in ArcGIS? If exporting to KML from ArcGIS, I guess the first step is ...
5
votes
3answers
206 views

How to know if shapefile is georeferenced?

I have a shapefile which is located in province in indonesia. it contains many sub-province if i removed sub regions inside a shapefile, and it leaves a small region, and my question is that small ...
1
vote
2answers
300 views

Rasters added to mosaic dataset only display at large acale

I have a set of 357 rasters in .jp2 that I've added to a mosaic dataset. All but 7 of them display properly, but the 7 only display at larger scales, around 1:6500 and under. I've tried adding them ...
36
votes
10answers
65k views

What ratio scales do Google Maps zoom levels correspond to?

Can anyone provide me with a link (or some details) on the actual ratio to "zoom level" figures for Google Maps? e.g. Google Maps Level 13 = 1:20000
0
votes
0answers
25 views

Leaflet control to display scale in native/declared CRS (i.e. degrees)

I'd like to have a Leaflet map display the scale of a layer in native coordinates (i.e. degrees in EPSG:4326). From what I have read so far the map control always handles meters; is there a way to ...
7
votes
2answers
2k views

How to create a vertical scale bar in ArcMap?

Wondering if anyone out there knows how to create a vertical scale bar in ArcMap? With text I can adjust the angle. Is this possible with a scale bar as well?
1
vote
0answers
18 views

Creating Concentric circles using the ggmap function from GGMAP package R [duplicate]

I would like to create two concentric circles using the ggmap package and ggmap function, one being 1/4 mile and the other 1 mile radius around the 16 metro rail stations in Los Angeles California. It ...
0
votes
1answer
62 views

Area and distance calculation/measurement unexpected after projecting? [duplicate]

I have converted a GIS shapefile of Botswana from the geographic coordinate system GCS_WGS_1984 to the projected coordinate system Africa_Albers_Equal_Area_Conic to be able to calculate the area of ...
1
vote
1answer
31 views

Is it possible to display irregular values in the scale bar in QGIS 2.8?

Is it possible to display irregular - increasing values in scale bar in print composer? For example: 5, 20, 100, 250.
0
votes
0answers
22 views

Rules for scale specific layer style in GeoServer

I've got a very large polygon land cover map (millions of polygons) over a large area. Our first try at serving the data through GeoServer WMS was not very successful due to the large amount of small ...
2
votes
1answer
500 views

Displaying features at map scale corresponding to attribute?

Suppose one had a large dataset of features of vastly different sizes - perhaps political boundaries ranging from country to county. It would be useful to be able to display only the large countries ...
3
votes
1answer
55 views

Set scale dependant labels arcmap 10.3

I am wondering if it is possible to create scaled labels so that at a certain zoom level only one label appears but when you zoom in closer more labels appear for different fields. I have this ...
1
vote
2answers
104 views

Since upgrading to ArcGIS 10, my application doesn't rescale the map when the window is resized

I am upgrading a .NET application from ArcGIS 9.3 to ArcGIS 10.3. I've noticed that the map control behaves differently: the map no longer automatically rescales itself when the window is resized. To ...
1
vote
0answers
38 views

Set Layer Scale Range Still Draws When Layer is Grayed Out In TOC? ArcGIS 10.2

I have a layer which I have set the visible 'Scale Range' to don't show layer when zoomed out beyond: 1:18,489,298 and in beyond 1:9,244,6249. (I am using ArcgGIS Online/Bing Maps/Google Maps ...
1
vote
0answers
10 views

Adding active content to the Atlas in composer $scale

I have an Atlas of 178 pages that centers on different size villages, its all well organised through the composer and all works well. However, I can't use the scale bar as the differences between ...
2
votes
0answers
93 views

Different scale of basemap after exporting to PDF/Image

After creating and exporting my map to pdf/tif obviously there are different scales of the basemap in the exported file compared to the map I created in the printcomposer. See pictures... I am using ...
0
votes
0answers
13 views

how to set default scale for ecw in geoserver stores?

I added an ECW that it's default scale is 1:1,000,000 to stores of geoserver, and then went to Layer preview panel and clicked on the link to see the preview of map. But when the preview appears in ...
2
votes
2answers
164 views

Calculate scale of a raster

A raster has a cell size of 200 meters. What is the corresponding scale of the raster? New to GIS, using ESRI, semester is almost over but this one question is confusing. I didn't think you could ...
0
votes
0answers
22 views

Disabling Extent Based Rendering using ESRI Javascript API

I am using ESRI's javascript API to generate a heatmap renderer for my feature layer. I am noticing that the heatmap calculation/visualization is dependent upon what is in the current zoom extent. For ...
0
votes
0answers
44 views

How to convert map scale 1:10000 to nearest zoom level 16 scale 1:9028

I am making tile map service port for this map http://mapserver.geology.sk/sbd/. When you max zoom this map, you will get scale 1:10000. Tile size is 256px. You can check it here ...
1
vote
1answer
25 views

How to change rule-based Layer Styles all at once in QGIS?

Let's say I have a layer with buildings which is only shown when the scale is higher than 1:10000. When the scale is higher than 5000, I want them to show its function color (retail, residential, ...) ...
2
votes
1answer
3k views

How to calculate pixels per meter ratio, according to Google or Bing map zoom level?

I have an image and detect two points in the image. I want to calculate the distance between these two points. I'm using Google map and Bing map. I have x,y pixel values for both two points zoom ...
2
votes
1answer
65 views

How to calculate scale

I'm working on processing some geo-spatial raster data, JOG-A raster to be exact, and know the imagery is supposed to be to a scale of 1:250000. However I would like to calculate this in code but am ...
1
vote
1answer
66 views

Setting Scale Dependent Visibility for WMS in PyQGIS

This code imports 'MiniScale' mapping from my WMS miniScale = ...
1
vote
1answer
397 views

How to add Map Legend, Scale Bar and Select tool to an ArcGIS Server Service?

I have published a service from ArcMap to my Server Account but I can't figure out how to add the legend, scale bar and select tool to the service. According to the published service it was built ...
6
votes
1answer
1k views

How to automatically generate useful scales for data driven pages in ArcGIS desktop

I have been tasked with creating several hundred maps of properties that intersect a long pipeline. The maps will zoom to the part of the property which shows the intersection. The lengths of ...
3
votes
3answers
47 views

Layer Extent NOT Set When Bringing In ArcGIS Server map service?

I published a mapping service on ArcGIS Server 10.3, set the layer to 'Don't show layer when zoomed' 'in beyond' to 1:577,791, prior to publishing. When I bring in the mapping service into ArcMap, ...
1
vote
1answer
49 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). ...
2
votes
0answers
23 views

Creating a distance overlay that is computed by the distance of points/lines and recalculated on zooming

I created a fictional map and visualized it with d3. Now I would like to show a scale/rule so that the user can see which distance (kilometers,meters) he is currently using. I was thinking about ...
1
vote
1answer
117 views

How to deactivate zoom on the mouse wheel?

I need to fixed scale in canvas in QGIS but I didn't find this function. If I fix scale it is impossible to make zoom in or zoom out into canvas. Only one move which layers loaded can be do are ...
0
votes
1answer
130 views

Why are grid and scalebar measures 1mm too long in a 1:10000 print?

I used qgis 1.8 to compose a map from the WMS-service of the Belgian NGI. I added a scalebar and grid to it. When I measure it by hand, the distance between the longitudelines is 101mm instead of ...
1
vote
1answer
304 views

Relationship between scale, ppi, and map resolution

Wanting to know the screen resolution (pixels per inch) of my device, I displayed my map resolution and scale using this openlayers code: console.log("resolution: " + map.getResolution()); ...
0
votes
0answers
50 views

Arcgis v10.2.4 ios and android sdk shows wrong cache data

I hava tiledmap and it's scale is 500.000 and when i tried to show on android or ios devices. It on mapview it brings me cached data of scale 300.000 but when i tried to show it on web page , it works ...
2
votes
2answers
70 views

QGIS Composer wrong scale

I'm creating maps with a specified scale for the map window in QGIS Composer. Project CRS is WGS84, layers are WGS84, onthefly-transformation enabled. The area is approx. 1° x 1° (100 x 100 km). But ...
3
votes
1answer
320 views

Sensitivity analysis for coarse scale GIS epidemiological model?

I am working on an epidemiological model with disease incidence rate as dependent variable and environmental factors as independent variable. Disease data is available at county scale whereas ...
0
votes
0answers
107 views

problem with show highway labels in certaint zoom level with mapsforge map

I'm using a mapsforge map ( .map format) in my projet .I converted the OSM file to mapsforge file and i use it. I want to show highway labels from zoom 13 to zoom 20 .I'm using vetorial map viewer. ...
2
votes
3answers
214 views

Moving (translating and scaling) a polygon in a shapefile

Updated Question: I have an ESRI shapfile of the US, with Alaska, Hawaii, etc, broken down by county. I'm extracting the polygons (each representing a county) from the shp file, and then displaying ...
1
vote
0answers
67 views

Small discrepancy in scale reported by OpenLayers and GeoServer (after DPI fix)

I'm implementing some scale-dependent functionality in an application that uses OpenLayers 2.12 on the client and GeoServer 2.6.1 on the server. The legend is created in JavaScript and when a ...
2
votes
1answer
63 views

Fixed Scale / Fixed Zoom in eCognition

I'm wondering if there is any option in eCognition Developer / Architect were I can control Zoom or Scale Factors. It's necessary for my work that I use the same scale for all processing steps.
1
vote
1answer
104 views

How to show\hide symbols according scales

How to show\hide symbols according scales, I couldn’t figure out if there is a way to hide symbols depending on scales the same way we do with labels. For example, in the screenshots below, the ...
10
votes
3answers
3k views

Changing symbology at different scales in ArcMap?

I am using ArcMap 10 and I want to display my village parcel symbology differently at given scales. I have one idea to copy and paste same layer. But my question is that in a single layer, is it ...
1
vote
1answer
84 views

CartoDB - How do I turn on a scale (in feet / imperial) in the Visualization?

I'm making a map for an architectural site analysis and need to have a scale for the Visualization. Is this a feature in CartoDB? Thanks!
3
votes
1answer
40 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 ...
1
vote
0answers
149 views

How to get bounds coords by center LatLng point, width and height in pixels and zoom?

I have to calculate bounds coordinates to query mongodb box on server side to get data before google maps is loaded. How can I get four LatLng corners by center LatLng point, window width and height ...