Mapping objects on the map by distance

[paulobreim]

In many cases we need to check the location of photos or messages in a certain region. For example where a particular photo was taken.
My suggestion is to implement a function, where provided a latitude/longitude and a distance in km, the IPED puts on the map, all the items that satisfy this condition. This allows you to eliminate GPS accuracy differences.
So if I reference a house, for example, I can quickly see if within a certain radius, a photo appears, which is much easier to check photo by photo.
As IPED already has all geographic positions registered in metadata, it is easy to implement a function that calculates the distance from a given point. Havesine's formula solves easily, and there are ready-made routines in Java that already provide the data.

[lfcnassif]

I have already thought about this feature, I think it can be very useful. You can already draw a circle ou rectangle in the Map, but it is not easy to specify an exact distance from some point. I think I updated code to index geo points properly in Lucece since version 4, preparing for this. It may be possible to specify a rectangle distance using the search box, not sure, a circle may be more difficult. What do you think @patrickdalla to offer this easily in Map tab?

[patrickdalla]

The radius selection can help the selection and creation o a bookmark with the result selection. But it does not allow to specify a exact distance. Maybe we can capture the keybord somehow when the user starts drawing the circle in a way that if he starts pressing digits a dialog popsup to him finish the distance digit. A suggestion, maybe not so intuitive. Em sex., 18 de ago. de 2023 12:45, Luis Filipe Nassif < ***@***.***> escreveu:

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I have already thought about this feature, I think it can be very useful. You can already draw a circle ou rectangle in the Map, but it is not easy to specify an exact distance from some point. I think we already index geo points properly in Lucece since version 4. It may be possible to specify a rectangle distance using the search box, not sure, a circle may be more difficult. What do you think @patrickdalla <https://github.com/patrickdalla> to offer it easily in Map tab? — Reply to this email directly, view it on GitHub <#1821 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG247S3GLVZPXNDCCAPFBI3XV6LZBANCNFSM6AAAAAA3VXKSTY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[paulobreim]

I am not a java developer, I like C, but now I am using Dart (very good), and same language used in Flutter.

Can you test it:
import java.lang.Math;

public class DistanceCalculator {

public static final double EARTH_RADIUS_KM = 6371.0;

public static double calculateDistance(double lat1, double lon1, double lat2, double lon2) {
    double dLat = Math.toRadians(lat2 - lat1);
    double dLon = Math.toRadians(lon2 - lon1);

    double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
               Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
               Math.sin(dLon / 2) * Math.sin(dLon / 2);

    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));

    double distance = EARTH_RADIUS_KM * c;

    return distance;
}

public static void main(String[] args) {
    double lat1 = -22.9068; // Latitude do ponto 1
    double lon1 = -43.1729; // Longitude do ponto 1

    double lat2 = -23.5505; // Latitude do ponto 2
    double lon2 = -46.6333; // Longitude do ponto 2

    double distance = calculateDistance(lat1, lon1, lat2, lon2);
    System.out.println("Distância entre os pontos: " + distance + " km");
}

}

Usually people have the exact location and radius they want to cover.
So I think that simply typing Latitude, Longitude and Radius is simpler.

[patrickdalla]

distanca calculation is already done on radius selection. What can be improved is method of input of this distance parameter for selecyion, that today is via mouse, but could evolve to exact number input somehow. Another feature could be using lucene latlonpoint fields so we can create lucene queries. This can improve performance (we should test) We can also create filters (based on new filtermanager interface). This filters could be based on distance from a point, bounding box, or even based on administrative boundaries (this boundaries should be queried from a nominatim server). Its seems sorl have some implementations of this type o queries, including sort by distance from a point. It seems all new features. But for this thread, a simple input method to specify the exact distance of radius selection could be enough. Have you tested this option on map tab Paulo? Em dom., 20 de ago. de 2023 21:32, Paulo Cesar Breim (PCB) < ***@***.***> escreveu:

…

I am not a java developer, I like C, but now I am using Dart (very good), and same language used in Flutter. Can you test it: import java.lang.Math; public class DistanceCalculator { public static final double EARTH_RADIUS_KM = 6371.0; public static double calculateDistance(double lat1, double lon1, double lat2, double lon2) { double dLat = Math.toRadians(lat2 - lat1); double dLon = Math.toRadians(lon2 - lon1); double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2); double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); double distance = EARTH_RADIUS_KM * c; return distance; } public static void main(String[] args) { double lat1 = -22.9068; // Latitude do ponto 1 double lon1 = -43.1729; // Longitude do ponto 1 double lat2 = -23.5505; // Latitude do ponto 2 double lon2 = -46.6333; // Longitude do ponto 2 double distance = calculateDistance(lat1, lon1, lat2, lon2); System.out.println("Distância entre os pontos: " + distance + " km"); } } — Reply to this email directly, view it on GitHub <#1821 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG247S5ZMVIYYWUHOKDOT3DXWK3DVANCNFSM6AAAAAA3VXKSTY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[lfcnassif]

Hi @patrickdalla, I'm away from my computer right now, maybe a screenshot of the distance button selection would help @paulobreim. By the way, I don't think its current behavior is intuitive (one mouse click to start selection and a second click to finish) maybe a mouse drag with button down would be more intuitive for users, for both the circle and rectangle selection.

[lfcnassif]

Hi @paulobreim, try this circle button to the right:

As I said, today it is not possible to specify an exact distance from an exact arbitrary point, I think this can be improved. @patrickdalla, if I remember, the circle radius used to be displayed in a label while it was being drawn/selected, but it was gone, that is very bad for the feature, could you take a look?

[patrickdalla]

The click and drag on map is already used to pan the map. Maybe with ctrl or shift pressed the radius selection could start instead of pan. I am away from computer too. Paulo, look at the tool bar on right side of map panel Em seg., 21 de ago. de 2023 10:28, Luis Filipe Nassif < ***@***.***> escreveu:

…

Hi @patrickdalla <https://github.com/patrickdalla>, I'm away from my computer right now, maybe a screenshot of the distance button selection would help @paulobreim <https://github.com/paulobreim>. By the way, I don't think its current behavior is intuitive (click to start selection and a second click to finish) maybe a mouse drag with button down would be more intuitive for users, for both the circle and rectangle selection. — Reply to this email directly, view it on GitHub <#1821 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG247SZPUAUCS4NY46MWTYTXWNWA7ANCNFSM6AAAAAA3VXKSTY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[lfcnassif]

The click and drag on map is already used to pan the map. Maybe with ctrl or shift pressed the radius selection could start instead of pan.

Right. So I think I prefer the current behavior, some users don't know about ctrl or shift modifiers in the timeline chart and they miss some features. Maybe we should display a quick help about them in UI, maybe a tooltip...

[paulobreim]

I've already tried using the circle, it works well, but in my case it's not very useful.
Let me explain step by step what would normally cover forensic cases.

The first thing we have is a latitude/longitude, or address (street number) of a given occurrence.
Searching the address in googlemaps, it's easy to get the gps, for example -23.560163636192733, -46.576539116662104.

In the IPED maps, there would need to be a way to inform this location, preferably by latitude/longitude.
Would it be complicated to type this in the search field, and when I hit enter, the map has the visualization of that point?

On the map below, where the red arrow is, it's the GPS position above, but I did it manually, which isn't as accurate.

A little above to the right, we have a 2, indicating 2 photos and we want to know how far this location is. Google maps has a function to calculate this.

In fact, not even a map would be needed, this could also be in the metadata area, when the user chooses image:gps and typing a gps reference and distance, the data could have the distance information.

Another option would be to enter something specific in the search line similar to.
gps: -23.5601, -46.57653, 20
And it would show all files that have gps in the metadata with a column containing the gps and distance.

ps: are there a away to list all files with gps like:
Image:GPS:GPS Latitude:* ?

[lfcnassif]

Would it be complicated to type this in the search field, and when I hit enter, the map has the visualization of that point?

I would make available another input box into the map for this. But everything needs work and effort...

ps: are there a away to list all files with gps like:
Image:GPS:GPS Latitude:* ?

Yes, there is a built-in filter at the top-left ready for this.