Two maps on one globe · free
Astrocartography for couples
Draw your partner's lines over yours as thin dotted lines, then see the cities within 500 km of a love line for both of you. Free, nothing stored.
Can astrocartography be done for couples?
Yes. Enter both birth charts and this map draws both sets of lines on one globe, yours in solid and dashed lines and your partner's as thin dotted lines, then lists the cities near a love line for both of you. Each person's lines keep their own meaning; the overlay shows where they meet.
Couples use it to choose a trip, to think about a move they are already considering, or simply to see how two maps relate. It reads places, not the relationship itself.
How to overlay two maps
- Enter your own birth date, time and place in the Birth tab and press "Draw my lines".
- Under "Add a second person", enter your partner's date, time and birth place, then press "Overlay their lines".
- Their lines appear as thin dotted lines in the same planet colors as yours, so a pink dotted line is their Venus and a solid or dashed pink line is yours.
- A list called "Shared places for love" appears under the form.
To hide their lines for a moment, untick "Second person's lines" in the Lines tab. To clear them, press "Remove". The planet and line type switches apply to both maps, so you can, for example, show only Venus for both of you.
What "Shared places for love" shows
The map takes the lines astrologers link with love (Venus DC and AC, Jupiter DC, Sun DC, Moon DC and North Node DC) on both charts. It then finds the cities with more than 250,000 people that lie within 500 km of one of those lines for you and within 500 km of one for your partner, and lists up to 10 of them, smallest combined distance first.
Each row shows your nearest love line and its distance, then theirs. Click a row and the map flies to the city and opens its panel. That panel, with its nearest lines and relocated chart, reads the city for the main chart, which is yours. To read the same city from your partner's side, enter their details as the main person.
If no city qualifies, the list says so. That only means your love lines run far apart. Look at the overlay itself: there may be smaller towns, or other kinds of lines, where your maps meet.
Reading two maps together
The same city can mean different things for two people. Your Venus DC line and your partner's Moon DC line near one place would be read as delight on your side and emotional closeness on theirs. A city on your love line and their Saturn line would be read as warm for you and more serious or demanding for them. Both readings belong to the place.
Read each line for the person it belongs to, then ask what you want from the place as a couple. A holiday asks less than a home. For a home, it can help to read the IC lines of both maps, the lines of roots and family, which the home theme explains.
Overlay vs composite vs Davison map
Three techniques are used to map two people. This map does overlays.
| Technique | What it is | On this map |
|---|---|---|
| Overlay | Both people's own birth maps drawn on one globe, each with its own lines | Yes |
| Composite map | Lines for a composite chart, a single chart built from the midpoints between the two people's planets | No |
| Davison map | Lines for a Davison chart, a single chart cast for the midpoint in time and place between the two births | No |
The overlay keeps both people visible, which makes it easy to see where your lines and theirs run close together, and to read each line for the person it belongs to.
Beyond couples
The overlay works for any two people: a parent and a child, two friends planning a trip, business partners choosing a base. The shared places list always uses the love lines, but the overlay shows every line of both maps.
Birth times matter twice here. The "How sure?" setting and its shaded zone apply to your own chart; the second person form takes a date, a time and a place. If your partner's time is a rough guess, read their lines as approximate and give a shared place a few hundred kilometers of slack before reading much into it.
Both charts are calculated in your browser and nothing is stored on a server. A copied link carries both sets of birth details after the # sign, so ask your partner before you share it.
No line says whether a relationship will last, and the map is not a way to judge a partner. Read it as a shared conversation about places, not a verdict on the two of you.
How do I see my partner's lines on my map?
Draw your own lines first, then enter your partner's birth date, time and place under "Add a second person" and press "Overlay their lines". Their lines appear as thin dotted lines in the same planet colors as yours, and a list of shared places for love appears under the form. Untick "Second person's lines" to hide them.
What if we have no shared places for love?
It means no city with more than 250,000 people lies within 500 km of a love line for both of you. It says nothing about the relationship. Look at the overlay for smaller places where your lines meet, or compare the cities you are already considering in the Compare tab.
Do both of us need exact birth times?
For the lines to be placed well, yes. Lines move about 111 km at the equator for every 4 minutes of birth time, for each of you. A partner with an uncertain time will have less certain lines, so give any shared place a few hundred kilometers of slack before reading much into it.
Is this the same as a composite or Davison map?
No. A composite map comes from a single chart built from the midpoints between two charts, and a Davison map from a chart cast for the midpoint in time and place between two births. This map does neither: it keeps both birth maps and lays one over the other, so each person's lines stay their own.