Resolution is a measure of the smallest unit or sample in data that can be distinguished from any other, and/or the number of samples for a given unit.

learn more… | top users | synonyms

0
votes
0answers
24 views

Determining epsilon for county polyline simplification via Ramer–Douglas–Peucker

I have a proprietary shapefile with all the counties in the US, and some metadata. I need to export it to geojson. The points are in lat/long decimal degrees. I will render the county shapes on an ...
1
vote
0answers
12 views

DPI Dependent OSM Tile Rendering

We have built an OSM Tile Server following the instructions at http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/ The tile server is rendering tiles, but the street names on ...
3
votes
1answer
32 views

How do I get GDAL_translate to output better resolution

I have a set of GeoPDFs that I converted to GeoTiffs. However, the end results are horrible. They are very pixelated. The command I passed was gdal_translate -of GTiff inFile outFile -co ...
2
votes
1answer
33 views

ENVI 5: High resolution export of multiband imagery

I have to export some multiband Landsat imagery (Landsat channel combination 543) in high resolution in ENVI 5 for a Figure which I later will edit in Adobe Photoshop and Illustrator, best would be ...
1
vote
2answers
62 views

Divide two rasters with different cell sizes using ArcGIS for Desktop?

I've got two rasters of the exact same location (So every pixel in one raster is equivalent to the pixel in the other raster). Raster A has a resolution of 6m per pixel. Raster B has a resolution of ...
1
vote
1answer
29 views

Band Issues in Quickbird Satellite data

I procure data from DigitalGlobe (Quickbird Satellite data) for different periods hence data having some different band combination. I have attached an example image to show the problem. I am looking ...
1
vote
0answers
52 views

How to define the output raster resolution when rasterizing a vector?

I have a vector file which I want to rasterize and adjust its resolution to the reference map, in QGIS. I tried spatial_sync_raster function in R to set all the rasters into the same resolution as ...
0
votes
1answer
37 views

How to create this raster?

I have three layers: building data (polygon) attributed with parking lot capacity on the road parking data (line), also contains parking space data car parks (polygon) includes parking space ...
1
vote
1answer
26 views

Long term NDVI mean from different resolution satellite imageries

I have 10 years satellite imageries of different resolution (Landsat TM, LISS3, AWiFS and Landsat 8). My aim is to generate long term mean NDVI from that data. Since the resolutions are not same, i ...
1
vote
0answers
44 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 ...
1
vote
1answer
36 views

Resolution of NED (National Elevation Dataset)

I downloaded some DEMs from the USGS with a resolution of 1/3 degrees for different areas in the US. Now I am looking at the files and saw that all DEMs have the same number of columns and rows. I ...
1
vote
2answers
56 views

Worldwide High-Resolution Water Body Shapefiles with Consistent Scale

Where from your website can I access worldwide vector water body shapefiles that have better resolution than the generic SRTM 90m data? Do you have coastlines and inland features (lakes, estuaries, ...
1
vote
1answer
23 views

How can I check the resolution of my .img raster file in ArcMap?

I'm just learning ESRI's ArcMap and I just wanted to know where I can find the resolution of a .IMG raster layer.
1
vote
1answer
52 views

Why is the BING basemap in ArcView different from the one on http://www.bing.com/maps/

The quality of the original Bing imagery on the Bing Website is much higher. How can I get it into ArcMap? I read, that the ArcMap imagery BaseLayer is based on Bing service! South of Ouagadougou ...
1
vote
1answer
24 views

Cell file resolution differs from current region in GRASS GIS

Error r.terraflow elevation=cdnh43e_v1@user1 filled=cdnhfill direction=cdnhdir swatershed=cdnhsink accumulation=cdnhacc tci=cdnhtci ERROR: cell file cdnh43e_v1 resolution differs from current ...
0
votes
0answers
55 views

Setting raster resolution in meters when working in a Geographic Coordinate System

I work in WGS 84 (Geographic Coordinate System) in ArcGIS 10.1. I need to create a raster specifying its cell size in meters, and output it in WGS84. Is it a good solution (towards a less shape/area ...
1
vote
2answers
91 views

How does Environments > Raster analysis > Cell size works in ArcGIS?

How does Environments > Raster analysis > Cell size works, when creating a raster from a polygon using ArcGIS? I have tried to handle both "Maximum of Inputs" and "Minimum of Inputs" and nothing ...
1
vote
1answer
81 views

Why doesn't my Mapbox + Leaflet viz look retina-friendly?

This is probably a very simple question but it's not clear to me. The Mapbox docs say: When you create a project from the editor, Retina (high resolution) tiles are automatically used on ...
1
vote
1answer
44 views

How to know the GSD (grid size, resolution) in meters of an existing raster when working in Geographic coordinates?

I would need to know the GSD or grid size (resolution), in meters, of a raster created when working in a Geographic coordinate system in ArcGIS. Is is possible? Even better, can I set the Cell size ...
1
vote
2answers
77 views

Changing raster resolution using ArcGIS for Desktop?

My raster is displaying at a very low resolution so it is almost useless. Last time I used this file it was at a much higher resolution, so I know the information is there. To change it I first ...
1
vote
1answer
42 views

Setting resolution for GRASS raster

I am trying to calculate volume using the GRASSplugin. I have my area information in vector format and my depth information in raster. I read that it is important to set the raster resolution before ...
2
votes
1answer
870 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 ...
0
votes
1answer
46 views

Raster Calculator Blurring Image Results

I am trying to run a NDVI analysis using raster calculator on Arg Map 10.2.1 and the results create blurry or bleeding image, almost as if the map has been dipped in water. I am using the default ...
0
votes
0answers
67 views

How to reassign the values of a raster, based on the pixels of the raster beneath it?

In ArcMap 10.2.1, I have two rasters. Raster1 shows the extent of a habitat, and each pixel contains a categorical value for its land cover type (values 1-3). Raster1 has the smaller spatial extent of ...
1
vote
1answer
87 views

Appropriate pixel size when converting vector to raster

I am converting vector polygons into raster datasets. Is there a standard calculation for converting the scale of the vector into an appropriate pixel size (e.g. 25 metres)? My vector has been ...
4
votes
4answers
461 views

Exporting large high resolution map to PDF in ArcMap errors?

I am attempting to export a large E size map at 300 DPI in ArcMap 10.2.2 but each time I export there are errors on the map. Once the PDF is generated there are areas where symbols are stretched out ...
1
vote
0answers
20 views

Why does image resolution decrease when I import an image into the georeferencer?

I'm using QGIS 1.8.0 on Windows 7. Usually the georeferencer functions very well. However, when I try to import a particular aerial photograph (in either .tif or .jpg format) the resolution of the ...
0
votes
0answers
20 views

Low quality legend in QGIS [duplicate]

I am sorry to repeat a question already asked by someone else, but it has not been answered yet. When I create a map in QGIS the legend symbols for some reasons have a very bad resolution and are not ...
0
votes
1answer
76 views

openlayers 3 function resolution

I'd like to make visible my var text between two resolutions so to speak between 150 and 50 for instance. but I didn't find how to do this yet. var communes = new ol.layer.Vector({ ...
0
votes
0answers
91 views

QGIS-Merge or create virtual raster files without losing definition?

I am new to QGIS and relatively new to GIS (so please be aware I am not that familiar with a lot of technical terminology). I am trying to merge several tiff files as either a virtual raster or a ...
0
votes
2answers
124 views

SPOT NDVI resolution

I downloaded SPOT S10 NDVI data which is supposed to be 1km spatial resolution. When I open the images in ArcMap the resolution is definitely not 1km and the NDVI values seems to be inverted with ...
2
votes
1answer
135 views

ArcScene 2D export

I'm submitting a paper to PlosOne, and have been using ArcScene to produce my 3D mapping. However, I'm struggling to comprehend quite how to meet their image requirements ...
9
votes
1answer
266 views

When dealing with rasters of varying resolutions should one resample to the highest or lowest resolution?

I'm looking for recommendations on best practices for dealing with raster data layers with different resolutions and projections. The advice I've been given is to always resample to the layer with the ...
0
votes
1answer
83 views

change spatial resolution

I have two types of image, one of them is a TRMM image with 0.25 degree cells and the other one is a MODIS image with 1 km spatial resolution. How can I change my TRMM image resolution to 1 km ...
1
vote
1answer
37 views

what is the relevance of cosine in determining map resolution? [closed]

"At any latitude and zoom level, you can determine the scale by using the following equation" Map resolution = 156543.04 meters/pixel * cos(latitude) / (2 ^ zoomlevel) is a quote from ...
0
votes
0answers
40 views

QGIS pixel/square cms using scale, dpi

The data (vectors) I'm using are 5cm in resolution. I think that resolution refers to accuracy of the data and not the image resolution. I've produced maps using the QGIS print composer and exported ...
2
votes
2answers
351 views

Print City Map in High Resolution with TileMill (OSM Data)

I'm rather beginner in Print Map and GIS. I'd like to print the map of my little city using the data in OpenStreetMap. I've got an environment(local) with OSM DataBase and I'm using TileMill to ...
2
votes
1answer
38 views

references for the colloquial naming of spatial data resolution

In our era of data deluge, many folks, including myself, quest for ill-defined "high-resolution" datasets. I suspect that colloquial description of spatial resolution as "high" or "low" is and will ...
2
votes
0answers
121 views

How can I improve the resolution of a vector grid made in north pole stereographic projection?

I've been struggling with this for a while and wondered if someone could lend a hand. I have a map which already has sampling points from centroids in a 35x35km grid that was created in north pole ...
4
votes
1answer
138 views

Openlayers tiles source with poor resolution, how zoom out?

I am using Openlayers to display a map from Vienna Open Data (Capabilities) in an app for mobiles, which have higher DPI screens. The resolution of the tiles is not so good (I suppose because they ...
2
votes
0answers
2k views

QGIS 2: How to create a regular vector grid at fine scale and for large area?

In QGIS, we wish to create a regular vector grid with 25*25m resolution and over an area of around 12000 km2. We tried to use: -vector>research tools> vector grid - and v.mkgrid function from GRASS ...
1
vote
2answers
277 views

Decrease resolution of vector shapes (polygon) i.e. reduce size and number of points in outer ring

I'm trying to get a kmz export down to less than 3 megabytes and am wanting to do so by reducing the number of points in my polygons' outer rings. I've seen this concept in action when it comes to ...
1
vote
0answers
62 views

grass region resolution error

I am working on a raster, but I can't set a correct region for it. In the Set region to match this raster map field, I select my raster map to change current region, but its resolution does not ...
5
votes
2answers
718 views

Reduce the resolution of a shapefile in R (or QGIS if necessary)

I'm using shapefiles of history U.S. state boundaries from NHGIS to make maps in R. These shapefiles are much higher resolution than I need when making maps at the scale of the country: over 2 million ...
6
votes
3answers
375 views

Precision vs Resolution in elevation data

Update: A good example of my confusion: on the Wikipedia page for "digital terrain model" one can find the following statement about a satellite in the "See Also" section: TanDEM-X: generation of ...
0
votes
1answer
164 views

Saving geotiff in R - why resolution on x and y is not the same?

I have some data and i want to save it as a geotiff in R. This is not a problem but even if in my command line i set the resolution on x as 1 and on y as 1 after the geotiff is generated the ...
1
vote
2answers
1k views

Exporting maps at high resolution for a specified area

I am using ArcGIS 10.1 and am very new to it. I have Bing Maps aerial imagery of a particular road intersection and I want to export the map as a TIFF at a 1:1000 scale. When I zoom in and then use ...
2
votes
2answers
164 views

Resolution difficulties in Grass

I have gone through similar questions to mine here, but I didn't find a solution. Please help! When cropping a raster image by using g.region & r.mapcalc, I get a new image but the resulting ...
0
votes
2answers
215 views

How to modify 2 raster images to have the same resolution?

I have data for 2 rasters images that have different resolutions: z downloaded from trmm An MSAVI2 output image. For calculating the correlation between them, the data has to be in the same ...
1
vote
1answer
744 views

Printing High Resolution Open Maps?

I hope my question does not silly but I am QGIS rookie and am really struggling to find a solution. I have the added the Google Street Layer to my project on top of which I worked with my points and ...