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Blurred Satellite Background Image

Open erev-84 opened this issue 3 years ago • 8 comments

Hello,

As suggested to me in Issue #11254, since ArcGIS's image quality is not good, I tried to get satellite background photos from MapQuest, but as can be seen in the photos below, MapQuest's image quality is as bad as ArcGIS.

Also, the coordinates of the location where i want to get the satellite background images are 35.186715 32.999921

ArcGIS ==>

54B8C105-A92C-4148-A56D-FFF21B32BA77

MapQuest ==>

339EC4B7-CCC0-41FA-955A-4663EF28749D

39839A9A-B52A-4A46-AA6E-6703F8F9303B

832846F5-B0A2-4561-B9F8-DEF0DBE97E5B

Also, I want to point out that as can be seen on the screenshot below the satellite images in the same location on the MapGuest site are very high quality. What is the reason for the quality difference between the quality of satellite images on MapQuest's site and the satellite images downloaded via api?

632CC1A9-07E7-45D0-803C-45AD06B7B0C0

I also wanted to try Google Map, but I couldn't test the image quality of Google Maps because Google Map's API is very expensive.

Apart from Google Maps, ArcGIS and MapQuest, are there any other geo data providers I can try?

If you could help me to get good quality satellite background images, I would be very grateful.

Thanks in advance

erev-84 avatar Jul 27 '22 20:07 erev-84

Did you try increasing the number of tiles? Maybe -t 100?

behrisch avatar Jul 28 '22 09:07 behrisch

Hello @behrisch,

First of all thank you for the reply.

No but I'll try it today and let you know. By the way, what is a tile and what happens when it is increased?

erev-84 avatar Jul 28 '22 09:07 erev-84

Tiles are parts of a bigger map or satellite image. They are used to keep the original map modular and allow selective download of a smaller area. In the context of tileGet.py, increasing the number of tiles will reduce the area each tile represents and hopefully lead to better resolution.

m-kro avatar Jul 28 '22 10:07 m-kro

Hello,

Thanks, by the way, how much can I increase the tile up to?, ıs there have any limit?

erev-84 avatar Jul 28 '22 11:07 erev-84

No hard limit, at least not from our side. Every tile corresponds to a request to the map provider. Mayb your IP gets blocked for a while if you exaggerate the number of requests per unit of time.

m-kro avatar Jul 28 '22 11:07 m-kro

Hello,

I increased the tile as you suggested and the resolution is better now. I tried several times but maximum tile limit is 448 in my end.

For reference, if anyone has resolution problems like me, I am sharing the results below.

10 Tile ==>

E63A056F-C489-4375-B02D-8A01242A2517

100 Tile ==>

22584E18-13C6-4357-A79D-CA7D143D8CBF

448 Tile ==>

C6251078-D076-450C-B0D0-C42CD7E10A70

erev-84 avatar Jul 28 '22 15:07 erev-84

By the way, I set tale to 1000 but it stays at 458 every time.

is there a method that you can suggest to me to make tile more than 458? @behrisch @m-kro

erev-84 avatar Aug 08 '22 00:08 erev-84

Most likely you have reached the resolution limit of your map server. There might other vendors that offer higher-resolution data at a price.

namdre avatar Aug 09 '22 07:08 namdre

Hello again,

The screenshot below is taken from Apple Map's app and as you can observe, resolution of the satellite image is better with Apple Maps. Is it possible to get satellite images from Apple Maps? and how can I do that?

image

ArcGIS satellite image ==>

image

erev-84 avatar Aug 18 '22 18:08 erev-84

You could try to follow this documentation: https://developer.apple.com/documentation/snapshots/create_a_maps_web_snapshot

behrisch avatar Aug 25 '22 14:08 behrisch

seems to be resolved

behrisch avatar Dec 22 '22 10:12 behrisch