Dear Conference Secretary,

My name is Nguyen Quang Viet. I previously registered for the conference and completed the registration fee payment.

However, due to personal commitments, I have decided to withdraw my abstract proposal and will unfortunately be unable to participate in the conference.

I would like to inform the Organizing Committee of this change so that the conference arrangements can be adjusted accordingly.

Thank you very much for your understanding and support.

Kind regards,

Nguyen Quang Viet

On Tue, 16 Jun 2026 at 13:27, secretariat-2026--- via GIS-IDEAS < gis-ideas@geoinfo-lab.org> wrote:

Dear Authors,

We would like to kindly remind all authors whose papers have been accepted for presentation at GIS-IDEAS 2026 to complete their conference registration and payment as soon as possible. As previously announced, we have sent several reminders regarding the early registration deadline of May 31, 2026. However, the number of registered authors remains relatively low at this stage. Please note that, according to the conference policy, at least one author of each accepted paper must register for the conference and pay the required conference registration fee, including the publication fee for the Springer Proceedings and TGIJ journal (If accepted). Failure to complete the registration and payment process will result in the paper being excluded from the conference proceedings and therefore not published in the Springer volume. We sincerely encourage all authors who have not yet completed their registration to do so at their earliest convenience to ensure the inclusion of your papers in the official conference proceedings. If you have already completed your registration and payment, please disregard this message. Should you have any questions regarding the registration process, please do not hesitate to contact the organizing committee. Thank you for your cooperation, and we look forward to welcoming you to GIS-IDEAS 2026 in Hanoi.

Best regards, GIS-IDEAS 2026 Secretariat _______________________________________________ GIS-IDEAS mailing list -- gis-ideas@geoinfo-lab.org To unsubscribe send an email to gis-ideas-leave@geoinfo-lab.org

Dear GIS-IDEAS 2026 Secretariat,

I would like to inform you that I am Chu Manh Hung, the author of the paper entitled:

“A GIS-Based Approach for Prioritizing Urban Retention Pond Locations to Mitigate Flood Risk: A Case Study of Hanoi, Vietnam”

The paper has been accepted for publication in the GIS-IDEAS 2026 conference proceedings.

I would like to kindly notify the Organizing Committee that my co-author, Nguyen Mai Chi, has already completed the conference registration, paid the required registration fee, and will attend the conference to present the paper.

Thank you for your attention and support. Please let us know if any further information or documentation is required.

Kind regards, Chu Manh Hung

On Tue, Jun 16, 2026 at 1:32 PM secretariat-2026--- via GIS-IDEAS < gis-ideas@geoinfo-lab.org> wrote:

Dear Authors,

We would like to kindly remind all authors whose papers have been accepted for presentation at GIS-IDEAS 2026 to complete their conference registration and payment as soon as possible. As previously announced, we have sent several reminders regarding the early registration deadline of May 31, 2026. However, the number of registered authors remains relatively low at this stage. Please note that, according to the conference policy, at least one author of each accepted paper must register for the conference and pay the required conference registration fee, including the publication fee for the Springer Proceedings and TGIJ journal (If accepted). Failure to complete the registration and payment process will result in the paper being excluded from the conference proceedings and therefore not published in the Springer volume. We sincerely encourage all authors who have not yet completed their registration to do so at their earliest convenience to ensure the inclusion of your papers in the official conference proceedings. If you have already completed your registration and payment, please disregard this message. Should you have any questions regarding the registration process, please do not hesitate to contact the organizing committee. Thank you for your cooperation, and we look forward to welcoming you to GIS-IDEAS 2026 in Hanoi.

Best regards, GIS-IDEAS 2026 Secretariat _______________________________________________ GIS-IDEAS mailing list -- gis-ideas@geoinfo-lab.org To unsubscribe send an email to gis-ideas-leave@geoinfo-lab.org