All Questions
Tagged with scale resolution
23 questions
1
vote
0
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83
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Scale and data precision
In the metadata of a database containing locations of natural hazards, it appears that the accuracy of the georeferencing of each point is associated with a scale of 1:10,000.
How can I associate this ...
- 691
0
votes
0
answers
994
views
Resolution of results exported from Google Earth Engine
I use this code to export my classification result from Sentinel2 images in GEE:
// Export the results to Drive
Export.image.toDrive({
image: result,
description: 'Unsupervised Classified Image',
...
- 645
2
votes
1
answer
176
views
QGIS - Exporting a raster layer without smearing individual rasters (so you can zoom)
I've been working with a raster map in QGIS (a shape file made up from squares) and now I'm trying to export it. I want to create an overview map for Germany that allows some magnification to look at ...
- 31
3
votes
3
answers
312
views
How to make the display of a satellite image the same across users?
I have a group of users counting objects in a satellite image. To keep viewing conditions the same I wish each user to have the same display (e.g., the same scale).
To do this, I have asked users to ...
- 31
1
vote
0
answers
942
views
Print Openlayers WMS map with fixed scaling
I need to print a map with a fixed scale (1:500 and 1:1000) on A4. The online map is done with Openlayers, the print request is sent to QGIS Server using WMS getPrint function.
I mange to get an ...
- 1,000
1
vote
0
answers
360
views
Which is the View.getResolution() units? [duplicate]
In OpenLayers v5, if I have a view defined like this:
var view = new View({
center: [952014.59, 5571269.68],
zoom: 8
});
, trying to get its resolution doing view.getResolution() outputs 611....
- 3,785
1
vote
1
answer
131
views
Appropriate resolution for regression analysis
I'm using ArcMap 10.3. I'm a student working on a research problem where I'm taking Landsat imagery (at 30-meters resolution) and regressing it against other datasets captured at different scales (up ...
- 425
2
votes
0
answers
633
views
How to get extent from current resolution in OpenLayers 3 for printing
I need to print a map with a fixed scale of 1:500 horizontally on a A4 paper (297x210mm). The map is done with Openlayers, the print request is sent to QGIS server using WMS getPrint function.
Till ...
- 1,000
2
votes
1
answer
1k
views
GeoServer - Conversion formula between scale and resolution
I am trying to figure out what is the conversion formula between scale and resolution used by GeoServer, specifically when creating a new gridset for Tile Caching. One would expect that the conversion ...
- 43
1
vote
1
answer
324
views
MapProxy WMS Print Scale Problem
The application that I work with consumes WMS services created in Geoserver via MapProxy. I used ysld to style my layers. As long as I want just display my layers in the application, the scales that I ...
- 73
1
vote
0
answers
256
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leaflet 2 layers with different resolutions
EDIT : Wrong projection pastet into this post.
Im trying to add 2 layers to the same leaflet map that have different resolutions.
They got the same Projection and bounds but different resolution.
I ...
2
votes
0
answers
2k
views
Calculate Bounding Box from Center at scale
So I was trying to find my answer in Calculating bounding box by given center and scale in Android?
And below is what I've implemented (Ruby) with the size heigh/width in pixels being the same as a ...
- 307
1
vote
1
answer
108
views
Image resolution and image scale of air photo
I was wondering if 2 aerial photos of different scales can have the same resolution. My understanding is they cannot as fine resolution images will only cover a small area and vice versa?
- 507
0
votes
2
answers
200
views
Why 1 cm is 1 km in my map? [closed]
I have this map in ArcMap (you can download my map document from here), and I don't know why, but if I set the scale to 1:1, I can see my whole city.
When I used the measure tool, I found out that ...
1
vote
1
answer
3k
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());
console....
- 81
2
votes
0
answers
3k
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 ...
- 131
1
vote
2
answers
1k
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, ...
- 11
5
votes
2
answers
30k
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 ...
- 51
2
votes
1
answer
66
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 ...
- 559
9
votes
1
answer
10k
views
Calculating bounding box by given center and scale in Android?
Given these conditions:
a scale like 1:50000
the center of the viewport is 100°E, 20°N
the size of the viewport is 400x600
How can I calculate the bounding box of the viewport?
The geographic ...
- 803
3
votes
1
answer
7k
views
Openlayers + WMS layer. Use scale or resolution + DPI
I have a problem with displaying map with WMS layer in Openlayers. I'm able to display it but the image of the map is not sharp especially at higher zooms.
I have a documentation from the map ...
- 31
4
votes
1
answer
2k
views
Dimensional analysis/conversion problem: Map scale to image resolution (dpi)
Given a map scale of 1:17,200 and a raster whose cell size is 6 inches, what resolution (dots per inch) should I choose when exporting the map to an image in order to maintain the raster's native ...
- 35.9k
2
votes
2
answers
2k
views
MapServer computes wrong map scales -- off by factor 0.77. Or is it just me?
I've noticed in a current project that MapServer seems to get the map scale wrong, or then I'm wrong, but don't see how.
My mapfile contains the following definitions:
RESOLUTION 72 # this is the ...
- 1,161