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.

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2
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1answer
25 views

Why does the resolution decrease with increasing incidence angle in the Sentinel-1 SAR sattelite

On this link (Sentinel1 webpage for a SLC product), the resolution is written as a range from the highest corresponding to low incidence angle, to the lowest resolution corresponding to high incidence ...
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0answers
22 views

New Issue with Open Layers Plugin Google Satellite - low res?

Recently I've noticed this issue with the open layers plugin google satellite layer where the imagery is dark and of a lower-resolution than it used to be. I frequently use this imagery with ...
2
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1answer
84 views

How to export the map in very high resolution

I made a map in QGIS. Now I want to export the resulting image (layers upon layers) for further processing in GDAL. The print composer only lets me export an image up to a fixed size. If I try to ...
0
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0answers
30 views

Reducing cell size of DEM for processing reasons?

I need to calculate the solar radiation for a region of interest, and I am using the 'solar radiation' tool implemented in ArcGIS (10.1) and a DEM with cell size 1x1. It is 3 days now that ArcGIS is ...
1
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1answer
28 views

Spatial Resolution Reprojection - rom Angular to Rectangular Values with GDAL?

I have an image in a WGS 84 / No Defs projection. I can get it spatial resolutions in angular units for X axis and Y axis through geotransform parameters. If I would reproject this image into WGS 84 ...
1
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1answer
29 views

Downsampling Geotiff using summation - Gdal/Numpy

I am trying to downsample a 1 square km raster dataset to a much larger (.5 degree x .66 degree) dataset by summing all of the pixel values within this large grid cell. gdal_warp does not contain a ...
0
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2answers
28 views

How to produce a finer resolution spatial grid from coarser grid in R?

I have a spatial grid of an image. Now I want to use this grid and make a finer resolution grid out of it. For example an image structure in R is given below: str(c) Formal class ...
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2answers
22 views

Unable to set raster surface resolution in ArcScene?

I have a 3-band subset of a Landsat image which I want to display in ArcScene (of ArcGIS version 10.2.1). The image is 30 meter resolution and I am draping it on a 25m resolution Aster DEM. But have ...
0
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1answer
34 views

Setting ArcMap layout size based on web unit (pixel) standard?

I need to export my map from ArcMap as SVG and display it on a web page in an exact size of 500x500 pixels, like this: <div id="mapSVG" style=" width: 500px; height: 500px;"></div> Can ...
2
votes
1answer
82 views

Why does my hillshade .ovr display in lower resolution in QGIS?

I have viewed a lidar terrain model hillshade .ovr file on QGIS and Arc and Arc has significantly higher resolution than QGIS. Any thoughts as to why this would happen and ways to enhance resolution ...
0
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0answers
47 views

World DEM vs ASTER Digital Elevation Models accuracy

I use DEM essentially to create surfaces on AutoCAD Civil 3D and then to create terrain profile views. I have been using mainly ASTER imagery from which I extract 2m contour lines in QGis and then ...
2
votes
1answer
55 views

Relationship between contour interval and spatial resolution of a generated DEM

If I have contour lines with interval say 10, 5, or 2 (etc.), and I generated a DEM from them, what is the relationship between between the contour interval and the resolution of the DEM? Irrespective ...
2
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1answer
28 views

How to interpret BUFR descriptors

I'm processing BUFR products from Eumetsat and I would like to ask for your help about the following descriptors: 002028 SEGMENT SIZE AT NADIR IN X DIRECTION 002029 SEGMENT SIZE AT NADIR IN Y ...
1
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1answer
54 views

Resolution problem in QGIS raster

I have a raster file I need to clip. I created a virtual raster which I used to "copy" the extent from in QGIS raster calculator. As a result, I get the raster with the extent I need, but pixel size ...
0
votes
1answer
55 views

Resolution problem

I have a Landsat TM image and in QGIS I used Clipper to crop my image. Then, I tried to reprojected it via Warp (Reproject) and the pixel size goes 29.9936,-29.9936. I do not understand why this ...
0
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0answers
108 views

How to export a high resolution .tif of a map with QGIS Print Composer

I have an high resolution image of a map in QGIS using the print composer. It has 300dpi and the final map would be near 12gB big. The system is a virtual server with 128gb RAM, means there are no ...
0
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1answer
42 views

Reduce raster resolution based on cell ratio

I have 2m impervious/non-impervious data. I would like to reduce the resolution to 30m and have the cell value for the 30m data be determined by the ratio or proportion of impervious / non-impervious ...
2
votes
1answer
64 views

Is there a better way to convert Raster to Point data? Don't need one point for every cell

I need to convert raster data to point data so I can use the points for interpolation via kriging. My problem is that my resolution is 5 ft and I'm working on a whole city. The data I am converting ...
3
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2answers
208 views

High resolution satellite

Can any one tell me from where I can buy commercial High resolution Satellite images for Biodiversity research ? I need some websites that sells these kind of images ?
0
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0answers
91 views

Appropriate number decimals for storing 20m resolutuion US county data in GeoJSON

I took the 20M the 2013 census bureau data and converted it to GeoJSON. I also used this Ramer-Douglas-Peucker implementation to reduce the point count and therefore number of points with an epsilon ...
0
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1answer
22 views

Geospatially match cells of different rasters - possible?

I have 2 rasters that were originally vector polygons. Raster2 was created from a selection of raster1. After converting both to raster, their cells don't match up (i.e. attribute info for each cell ...
2
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0answers
122 views

QGIS on UHD screen

I've got a new laptop that came with a 4k UHD screen. The GUI on QGIS doesn't scale well making most of the menu elements too small to easily see. Is there a way to change the scale of the gui?
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
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0answers
126 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 ...
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0answers
49 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 ...
4
votes
1answer
118 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
115 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
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2answers
128 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
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1answer
47 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 ...
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0answers
90 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
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1answer
42 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
33 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 ...
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0answers
150 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 ...
2
votes
1answer
50 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
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2answers
138 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
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1answer
39 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
67 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
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1answer
65 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
127 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
307 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
160 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
127 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
199 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
66 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
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 ...
0
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1answer
51 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
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0answers
124 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 ...
2
votes
1answer
168 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
1k 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
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0answers
23 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 ...