Support Public Lab Today! For the last twelve years, Public Lab has hosted Mapknitter.org so that people everywhere can make maps from their aerial photos. Unfortunately, current circumstances have led us to scale back and take certain services offline. MapKnitter.org will go offline August 15, 2022. The MapKnitter platform runs on a combination of volunteer and paid labor by the many people that build, maintain, and operate it via Public Lab. This is an effective combination thanks to the culture of Public Lab's Coding Community. Public Lab's web ecosystem, including PublicLab.org, MapKnitter.org, SpectralWorkbench.org, Infragram.org and associated projects, takes 20 hours a week from three Code Coordinators and our sysadmin. While cost effective, it is not free. Web hosting and server costs for MapKnitter are approximately $1000 per month. We are doing our best to sustain programming and support for our community, and we need your help. Thank you for being part of our community. We can't wait to be back online with you. Support Public Lab by making a donation today. *Part of the [Grassroots Mapping Curriculum](/wiki/mapping-curriculum) series.* MapKnitter is a free and open source tool for combining aerial images into a map, or composite image. Informally, we call this "stitching a map" and it's useful if you have many images of overlapping or identical areas, and getting either a web map or a printable map from your photos. MapKnitter can make maps from any image source, but it was designed for making maps with aerial photos from balloons and kites. Start using [MapKnitter.org](http://MapKnitter.org) or read on for more documentation! ## Exporting Once you're map is complete, you can download it as a single image in JPG and other formats. Read about the new Cloud exporter here: https://publiclab.org/wiki/mapknitter-cloud-exporter Learn more about [exporting maps in MapKnitter here](/mapknitter-exporting). ## Activities [activities:mapknitter] **** ## Questions [questions:mapknitter] **** ### Advanced * [Decisions with distortions](https://www.youtube.com/watch?feature=player_embedded&v=S8uUM3p3_Bk#!) - Learn about the design process of stitching maps when images are highly distorted or include tall buildings. This tutorial is in Photoshop, but the techniques are applicable to MapKnitter as well. * [Infrared multispectral compositing](/wiki/mapknitter-multispectral) (no video, in progress) Learn how to combine an infrared dataset with your map to assess photosynthesis. (Also: learn [how to collect infrared imagery](/tool/near-infrared-camera)) ...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, just responding to the stalled exports issue; @icarito is right that we are still trying to add more error reporting so this is not as mysterio..." | Read more » | almost 4 years ago | |||
| liz | "Thank you so much for your detailed reporting and perseverance! Tuesdays are currently our day to prioritize code issues and i will bring this up t..." | Read more » | almost 4 years ago | |||
| pataxte | "Good question @liz ! I did this and the order in which the images are selected does not make a difference, at least in this case the result is alwa..." | Read more » | almost 4 years ago | |||
| pataxte | "Good question @liz! And the answer is that the order in which the images are selected to be included in a map does not make a difference, at least ..." | Read more » | almost 4 years ago | |||
| liz | "I see what you are saying @pataxte , and it might take us several days to sort through this...in the meantime, sorry for your trouble! Could you ch..." | Read more » | almost 4 years ago | |||
| MarcinShena | "Super :) " | Read more » | almost 4 years ago | |||
| pataxte | "Hi again, I'm trying to sort this out while my head is in it, thus so many questions! Any scale of lower resolution than about 15 doesn't work, the..." | Read more » | almost 4 years ago | |||
| icarito | "Hi, The resolution is the number that you enter when you initiate the export. The label says: "Choose a scale in 'centimeters per pixel' (where a ..." | Read more » | almost 4 years ago | |||
| pataxte | "OK, thanks. How do I see the resolution of the exports? I'm a novice so I don't know where to look to tell that my images are very high resolution ..." | Read more » | almost 4 years ago | |||
| icarito | "Yes I went thru the logs and it appears that the exporter failed, likely out of memory because these exports are so high resolution (84k x 84k). @w..." | Read more » | almost 4 years ago | |||
| pataxte | "Thank you @icarito! Please let me know and any advice regarding what caused this issue and how to avoid it in the future would be great. " | Read more » | almost 4 years ago | |||
| icarito | "Thank you for reporting this! I can confirm that I see the unfinished exports in the queue: I'll investigate and open an issue with the developme..." | Read more » | almost 4 years ago | |||
| pataxte | "I see it, thanks so much for responding so fast! " | Read more » | almost 4 years ago | |||
| melissaalvarez501 | "Thanks For Sharing " | Read more » | almost 4 years ago | |||
| pataxte | "thanks @warren, and @liz! Looking at the image when I can see it brings up a question I posted earlier about not being able to control which layer ..." | Read more » | almost 4 years ago | |||
| warren | "This is now live on MapKnitter.org, thank you!! " | Read more » | almost 4 years ago | |||
| warren | "This has been solved -- https://github.com/publiclab/Leaflet.DistortableImage/issues/649 and should be published today, i hope! " | Read more » | almost 4 years ago | |||
| liz | "Gorgeous garden map @pataxte " | Read more » | almost 4 years ago | |||
| warren | "Also noting that i've started to track the "stacking order" issue here and made some progress: https://github.com/publiclab/Leaflet.DistortableImag..." | Read more » | almost 4 years ago | |||
| warren | "Hi, thanks! I responded to that issue here: https://publiclab.org/notes/pataxte/05-07-2020/mapknitter-exports-are-very-small-scale-unreadable " | Read more » | almost 4 years ago | |||
| warren | "Hi @pataxte - your image is just so spectacularly high resolution on a cm/px basis that 25 or even 10 cm/px was too small to get a readable image. ..." | Read more » | almost 4 years ago | |||
| pataxte | "Thanks @liz! Yup, it is http://mapknitter.org/maps/2020_bean_bed/ I am trying to print just the cluster of 5 overlapping images in the 'center' Sug..." | Read more » | about 4 years ago | |||
| liz | "Hi @pataxte, sorry to hear you are experiencing this, i'll share with our Code Community and work to figure this out. Can you please share the link..." | Read more » | about 4 years ago | |||
| pataxte | "Also re #mapknitter , when I try the new cloud export function i get a teeny tiny unreadable image in both tif and jpg formats, and this is true no..." | Read more » | about 4 years ago |